<s>
Windows	B-Operating_System
RT	I-Operating_System
is	O
a	O
mobile	B-Operating_System
operating	I-Operating_System
system	I-Operating_System
developed	O
by	O
Microsoft	O
.	O
</s>
<s>
It	O
is	O
a	O
version	O
of	O
Windows	B-Application
8	I-Application
or	O
Windows	B-Device
8.1	I-Device
built	O
for	O
the	O
32-bit	O
ARM	B-Architecture
architecture	I-Architecture
(	O
ARMv7	O
)	O
.	O
</s>
<s>
First	O
unveiled	O
in	O
January	O
2011	O
at	O
Consumer	O
Electronics	O
Show	O
,	O
the	O
Windows	B-Operating_System
RT	I-Operating_System
8	O
operating	O
system	O
was	O
officially	O
launched	O
alongside	O
Windows	B-Application
8	I-Application
on	O
October	O
26	O
,	O
2012	O
,	O
with	O
the	O
release	O
of	O
three	O
Windows	O
RT-based	O
devices	O
,	O
including	O
Microsoft	O
's	O
original	B-Device
Surface	I-Device
tablet	I-Device
.	O
</s>
<s>
Unlike	O
Windows	B-Application
8	I-Application
,	O
Windows	B-Operating_System
RT	I-Operating_System
is	O
only	O
available	O
as	O
preloaded	O
software	O
on	O
devices	O
specifically	O
designed	O
for	O
the	O
operating	O
system	O
by	O
original	O
equipment	O
manufacturers	O
(	O
OEMs	O
)	O
.	O
</s>
<s>
Microsoft	O
intended	O
for	O
devices	O
with	O
Windows	B-Operating_System
RT	I-Operating_System
to	O
take	O
advantage	O
of	O
the	O
architecture	B-General_Concept
's	O
power	O
efficiency	O
to	O
allow	O
for	O
longer	O
battery	O
life	O
,	O
to	O
use	O
system-on-chip	B-Architecture
(	O
SoC	O
)	O
designs	O
to	O
allow	O
for	O
thinner	O
devices	O
and	O
to	O
provide	O
a	O
"	O
reliable	O
"	O
experience	O
over	O
time	O
.	O
</s>
<s>
In	O
comparison	O
to	O
other	O
mobile	B-Operating_System
operating	I-Operating_System
systems	I-Operating_System
,	O
Windows	B-Operating_System
RT	I-Operating_System
also	O
supports	O
a	O
relatively	O
large	O
number	O
of	O
existing	O
USB	B-Protocol
peripherals	O
and	O
accessories	O
and	O
includes	O
a	O
version	O
of	O
Microsoft	B-Operating_System
Office	I-Operating_System
2013	I-Operating_System
optimized	O
for	O
ARM	O
devices	O
as	O
pre-loaded	O
software	O
.	O
</s>
<s>
However	O
,	O
while	O
Windows	B-Operating_System
RT	I-Operating_System
inherits	O
the	O
appearance	O
and	O
functionality	O
of	O
Windows	B-Application
8	I-Application
,	O
it	O
has	O
a	O
number	O
of	O
limitations	O
;	O
it	O
can	O
only	O
execute	O
software	O
that	O
is	O
digitally	O
signed	O
by	O
Microsoft	O
(	O
which	O
includes	O
pre-loaded	O
software	O
and	O
Windows	B-Application
Store	I-Application
apps	O
)	O
,	O
and	O
it	O
lacks	O
certain	O
developer-oriented	O
features	O
.	O
</s>
<s>
This	O
would	O
later	O
be	O
corrected	O
with	O
the	O
release	O
of	O
Windows	B-Operating_System
10	I-Operating_System
version	O
1709	O
for	O
ARM64	B-Architecture
devices	O
.	O
</s>
<s>
Windows	B-Operating_System
RT	I-Operating_System
was	O
released	O
to	O
mixed	O
reviews	O
from	O
various	O
outlets	O
and	O
critics	O
.	O
</s>
<s>
Some	O
felt	O
that	O
Windows	B-Operating_System
RT	I-Operating_System
devices	O
had	O
advantages	O
over	O
other	O
mobile	B-Operating_System
platforms	I-Operating_System
(	O
such	O
as	O
iOS	B-Application
or	O
Android	B-Application
)	O
because	O
of	O
its	O
bundled	O
software	O
and	O
the	O
ability	O
to	O
use	O
a	O
wider	O
variety	O
of	O
USB	B-Protocol
peripherals	O
and	O
accessories	O
,	O
but	O
the	O
platform	O
was	O
criticized	O
for	O
its	O
poor	O
software	O
ecosystem	O
,	O
citing	O
the	O
early	O
stage	O
of	O
Windows	B-Application
Store	I-Application
and	O
its	O
incompatibility	O
with	O
existing	O
Windows	O
software	O
,	O
and	O
other	O
limitations	O
over	O
Windows	B-Application
8	I-Application
.	O
</s>
<s>
Critics	O
and	O
analysts	O
deemed	O
Windows	B-Operating_System
RT	I-Operating_System
to	O
be	O
commercially	O
unsuccessful	O
,	O
citing	O
these	O
limitations	O
,	O
its	O
unclear	O
,	O
uncompetitive	O
position	O
of	O
sitting	O
as	O
an	O
underpowered	O
system	O
between	O
Windows	B-Protocol
Phone	I-Protocol
and	O
Windows	B-Application
8	I-Application
,	O
and	O
the	O
introduction	O
of	O
Windows	B-Application
8	I-Application
devices	O
with	O
battery	O
life	O
and	O
functionality	O
that	O
met	O
or	O
exceeded	O
that	O
of	O
Windows	B-Operating_System
RT	I-Operating_System
devices	O
.	O
</s>
<s>
Improvements	O
to	O
Intel	O
's	O
mobile	O
processors	O
,	O
along	O
with	O
a	O
decision	O
by	O
Microsoft	O
to	O
remove	O
OEM	O
license	O
fees	O
for	O
Windows	O
on	O
devices	O
with	O
screens	O
smaller	O
than	O
9	O
inches	O
,	O
spurred	O
a	O
market	O
for	O
low-end	O
Wintel	B-Device
tablets	O
running	O
the	O
full	O
Windows	B-Application
8	I-Application
platform	O
.	O
</s>
<s>
These	O
devices	O
largely	O
cannibalized	O
Windows	B-Operating_System
RT	I-Operating_System
;	O
vendors	O
began	O
phasing	O
out	O
their	O
Windows	B-Operating_System
RT	I-Operating_System
devices	O
due	O
to	O
poor	O
sales	O
,	O
and	O
less	O
than	O
a	O
year	O
after	O
its	O
release	O
,	O
Microsoft	O
suffered	O
a	O
US$900	O
million	O
loss	O
that	O
was	O
largely	O
blamed	O
on	O
poor	O
sales	O
of	O
the	O
ARM-based	O
Surface	B-Device
tablet	I-Device
and	O
unsold	O
stock	O
.	O
</s>
<s>
Only	O
two	O
more	O
Windows	B-Operating_System
RT	I-Operating_System
devices	O
,	O
Microsoft	O
's	O
Surface	B-Device
2	I-Device
and	O
the	O
Nokia	B-Device
Lumia	I-Device
2520	I-Device
in	O
late	O
2013	O
,	O
were	O
released	O
beyond	O
the	O
five	O
original	O
launch	O
devices	O
,	O
and	O
no	O
Windows	B-Operating_System
RT	I-Operating_System
counterpart	O
to	O
the	O
Surface	B-Device
Pro	I-Device
3	I-Device
was	O
released	O
due	O
to	O
a	O
re-positioning	O
of	O
the	O
Surface	B-Device
line	B-Device
into	O
the	O
high-end	O
market	O
,	O
and	O
a	O
switch	O
to	O
Intel	O
architecture	B-General_Concept
for	O
the	O
Surface	B-Device
3	I-Device
.	O
</s>
<s>
With	O
the	O
end	O
of	O
production	O
for	O
both	O
Surface	B-Device
2	I-Device
and	O
Lumia	B-Device
2520	I-Device
,	O
Microsoft	O
and	O
its	O
subsidiaries	O
no	O
longer	O
manufacture	O
any	O
Windows	B-Operating_System
RT	I-Operating_System
devices	O
.	O
</s>
<s>
At	O
the	O
2011	O
Consumer	O
Electronics	O
Show	O
,	O
it	O
was	O
officially	O
announced	O
that	O
the	O
next	O
version	O
of	O
Windows	O
would	O
provide	O
support	O
for	O
system-on-chip	B-Architecture
(	O
SoC	O
)	O
implementations	O
based	O
on	O
the	O
ARM	B-Architecture
architecture	I-Architecture
.	O
</s>
<s>
Steven	O
Sinofsky	O
,	O
then	O
Windows	O
division	O
president	O
,	O
demonstrated	O
an	O
early	O
version	O
of	O
a	O
Windows	O
port	O
for	O
the	O
architecture	B-General_Concept
,	O
codenamed	O
Windows	O
on	O
ARM	O
(	O
WoA	O
)	O
,	O
running	O
on	O
prototypes	O
with	O
Qualcomm	B-Architecture
Snapdragon	I-Architecture
,	O
Texas	B-Device
Instruments	I-Device
OMAP	I-Device
,	O
and	O
Nvidia	O
Tegra	O
2	O
chips	O
.	O
</s>
<s>
The	O
prototypes	O
featured	O
working	O
versions	O
of	O
Internet	B-Application
Explorer	I-Application
9	I-Application
(	O
with	O
DirectX	B-Application
support	O
via	O
the	O
Tegra	O
2	O
's	O
GPU	B-Architecture
)	O
,	O
PowerPoint	B-Application
and	O
Word	B-Application
,	O
along	O
with	O
the	O
use	O
of	O
class	B-Application
drivers	I-Application
to	O
allow	O
printing	O
to	O
an	O
Epson	O
printer	O
.	O
</s>
<s>
Initial	O
development	O
on	O
WoA	O
took	O
place	O
by	O
porting	O
code	O
from	O
Windows	B-Device
7	I-Device
;	O
Windows	B-Operating_System
Mobile	I-Operating_System
smartphones	B-Application
were	O
used	O
to	O
test	O
early	O
builds	O
of	O
WoA	O
because	O
of	O
lack	O
of	O
readily	O
available	O
ARM-based	O
tablets	O
.	O
</s>
<s>
Later	O
testing	O
was	O
performed	O
using	O
a	O
custom-designed	O
array	O
of	O
rack-mounted	B-Application
ARM-based	O
systems	O
.	O
</s>
<s>
WoA	O
devices	O
would	O
use	O
UEFI	B-Architecture
firmware	I-Architecture
and	O
have	O
a	O
software-based	O
Trusted	O
Platform	O
Module	O
to	O
support	O
device	O
encryption	O
and	O
UEFI	B-Architecture
Secure	O
Boot	O
.	O
</s>
<s>
ACPI	B-Device
is	O
also	O
used	O
to	O
detect	O
and	O
control	O
plug	B-Device
and	I-Device
play	I-Device
devices	O
and	O
provide	O
power	O
management	O
outside	O
the	O
SoC	O
.	O
</s>
<s>
To	O
enable	O
wider	O
hardware	O
support	O
,	O
peripherals	O
such	O
as	O
human	B-General_Concept
interface	I-General_Concept
devices	I-General_Concept
,	O
storage	O
and	O
other	O
components	O
that	O
use	O
USB	B-Protocol
and	O
I²C	O
connections	O
use	O
class	B-Application
drivers	I-Application
and	O
standardized	O
protocols	O
.	O
</s>
<s>
Windows	O
Update	O
serves	O
as	O
the	O
mechanism	O
for	O
updating	O
all	O
system	O
drivers	O
,	O
software	O
,	O
and	O
firmware	B-Application
.	O
</s>
<s>
Microsoft	O
showcased	O
other	O
aspects	O
of	O
the	O
new	O
operating	O
system	O
,	O
to	O
be	O
known	O
as	O
Windows	B-Application
8	I-Application
,	O
during	O
subsequent	O
presentations	O
.	O
</s>
<s>
Software	O
developed	O
using	O
this	O
new	O
architecture	B-General_Concept
could	O
be	O
processor-independent	O
(	O
allowing	O
compatibility	O
with	O
both	O
x86	O
-	O
and	O
ARM-based	O
systems	O
)	O
,	O
would	O
emphasize	O
the	O
use	O
of	O
touch	O
input	O
,	O
would	O
run	O
within	O
a	O
sandboxed	O
environment	O
to	O
provide	O
additional	O
security	O
,	O
and	O
be	O
distributed	O
through	O
Windows	B-Application
Store	I-Application
—	O
a	O
store	O
similar	O
to	O
services	O
such	O
as	O
the	O
App	B-Application
Store	I-Application
and	O
Google	B-Application
Play	I-Application
.	O
</s>
<s>
WinRT	O
was	O
also	O
optimized	O
to	O
provide	O
a	O
more	O
"	O
reliable	O
"	O
experience	O
on	O
ARM-based	O
devices	O
;	O
as	O
such	O
,	O
backward	B-General_Concept
compatibility	I-General_Concept
for	O
Win32	B-Library
software	O
otherwise	O
compatible	O
with	O
older	O
versions	O
of	O
Windows	O
was	O
intentionally	O
excluded	O
from	O
Windows	O
on	O
ARM	O
.	O
</s>
<s>
Windows	O
developers	O
indicated	O
that	O
existing	O
Windows	O
applications	O
were	O
not	O
specifically	O
optimized	O
for	O
reliability	O
and	O
energy	O
efficiency	O
on	O
the	O
ARM	B-Architecture
architecture	I-Architecture
and	O
that	O
WinRT	O
was	O
sufficient	O
for	O
providing	O
"	O
full	O
expressive	O
power	O
"	O
for	O
applications	O
,	O
"	O
while	O
avoiding	O
the	O
traps	O
and	O
pitfalls	O
that	O
can	O
potentially	O
reduce	O
the	O
overall	O
experience	O
for	O
consumers.	O
"	O
</s>
<s>
Consequentially	O
,	O
this	O
lack	O
of	O
backward	B-General_Concept
compatibility	I-General_Concept
would	O
also	O
prevent	O
existing	O
malware	O
from	O
running	O
on	O
the	O
operating	O
system	O
.	O
</s>
<s>
On	O
April	O
16	O
,	O
2012	O
,	O
Microsoft	O
announced	O
that	O
Windows	O
on	O
ARM	O
would	O
be	O
officially	O
branded	O
as	O
Windows	B-Operating_System
RT	I-Operating_System
.	O
</s>
<s>
Microsoft	O
did	O
not	O
explicitly	O
indicate	O
what	O
the	O
"	O
RT	O
"	O
in	O
the	O
operating	O
system	O
's	O
name	O
referred	O
to	O
,	O
but	O
it	O
was	O
believed	O
to	O
refer	O
to	O
the	O
WinRT	O
architecture	B-General_Concept
.	O
</s>
<s>
Steven	O
Sinofsky	O
stated	O
that	O
Microsoft	O
would	O
ensure	O
the	O
differences	O
between	O
Windows	B-Operating_System
RT	I-Operating_System
and	O
8	O
were	O
adequately	O
addressed	O
in	O
advertising	O
.	O
</s>
<s>
However	O
,	O
reports	O
found	O
that	O
promotional	O
web	O
pages	O
for	O
the	O
Microsoft	B-Device
Surface	I-Device
tablet	I-Device
had	O
contained	O
confusing	O
wording	O
alluding	O
to	O
the	O
compatibility	O
differences	O
and	O
that	O
Microsoft	B-Application
Store	I-Application
representatives	O
were	O
providing	O
inconsistent	O
and	O
sometimes	O
incorrect	O
information	O
about	O
Windows	B-Operating_System
RT	I-Operating_System
.	O
</s>
<s>
In	O
response	O
,	O
Microsoft	O
stated	O
that	O
Microsoft	B-Application
Store	I-Application
staff	O
members	O
would	O
be	O
given	O
an	O
average	O
of	O
15	O
hours	O
of	O
training	O
prior	O
to	O
the	O
launch	O
of	O
Windows	B-Application
8	I-Application
and	O
Windows	B-Operating_System
RT	I-Operating_System
to	O
ensure	O
that	O
consumers	O
were	O
able	O
to	O
make	O
the	O
correct	O
choice	O
for	O
their	O
needs	O
.	O
</s>
<s>
The	O
first	O
Windows	B-Operating_System
RT	I-Operating_System
devices	O
were	O
officially	O
released	O
alongside	O
Windows	B-Application
8	I-Application
on	O
October	O
26	O
,	O
2012	O
.	O
</s>
<s>
Windows	B-Device
8.1	I-Device
,	O
an	O
upgrade	O
for	O
Windows	B-Application
8	I-Application
and	O
RT	O
,	O
was	O
released	O
in	O
Windows	B-Application
Store	I-Application
on	O
October	O
17	O
,	O
2013	O
,	O
containing	O
a	O
number	O
of	O
improvements	O
to	O
the	O
operating	O
system	O
's	O
interface	O
and	O
functionality	O
.	O
</s>
<s>
For	O
Windows	B-Operating_System
RT	I-Operating_System
devices	O
,	O
the	O
update	O
also	O
adds	O
Outlook	B-Application
to	O
the	O
included	O
Office	B-Application
RT	O
suite	O
.	O
</s>
<s>
The	O
update	O
was	O
temporarily	O
recalled	O
by	O
Microsoft	O
shortly	O
after	O
its	O
release	O
,	O
following	O
reports	O
that	O
some	O
Surface	B-Device
users	O
had	O
encountered	O
a	O
rare	O
bug	O
which	O
corrupted	O
their	O
device	O
's	O
Boot	O
Configuration	O
Data	O
during	O
installation	O
,	O
resulting	O
in	O
an	O
error	O
on	O
startup	O
.	O
</s>
<s>
On	O
October	O
21	O
,	O
2013	O
,	O
Microsoft	O
released	O
recovery	O
media	O
and	O
instructions	O
which	O
could	O
be	O
used	O
to	O
repair	O
the	O
device	O
and	O
restored	O
access	O
to	O
Windows	B-Device
8.1	I-Device
the	O
next	O
day	O
.	O
</s>
<s>
While	O
Windows	B-Operating_System
RT	I-Operating_System
functions	O
similarly	O
to	O
Windows	B-Application
8	I-Application
,	O
there	O
are	O
still	O
some	O
notable	O
differences	O
,	O
primarily	O
involving	O
software	O
and	O
hardware	O
compatibility	O
.	O
</s>
<s>
Julie	O
Larson-Green	O
,	O
then	O
executive	O
vice	O
president	O
of	O
the	O
Devices	O
and	O
Studios	O
group	O
at	O
Microsoft	O
,	O
explained	O
that	O
Windows	B-Operating_System
RT	I-Operating_System
was	O
ultimately	O
designed	O
to	O
provide	O
a	O
"	O
closed	B-Application
,	O
turnkey	O
"	O
user	O
experience	O
,	O
"	O
where	O
it	O
does	O
n't	O
have	O
all	O
the	O
flexibility	O
of	O
Windows	O
,	O
but	O
it	O
has	O
the	O
power	O
of	O
Office	B-Application
and	O
then	O
all	O
the	O
new	O
style	O
applications	O
.	O
</s>
<s>
So	O
you	O
could	O
give	O
it	O
to	O
your	O
kid	O
and	O
he	O
's	O
not	O
going	O
to	O
load	O
it	O
up	O
with	O
a	O
bunch	O
of	O
toolbars	B-Application
accidentally	O
out	O
of	O
Internet	B-Application
Explorer	I-Application
and	O
then	O
come	O
to	O
you	O
later	O
and	O
say	O
,	O
'	O
why	O
am	O
I	O
getting	O
all	O
these	O
pop-ups	O
?	O
'	O
</s>
<s>
Windows	B-Operating_System
RT	I-Operating_System
does	O
not	O
include	O
Windows	B-Device
Media	I-Device
Player	I-Device
,	O
in	O
favor	O
of	O
other	O
multimedia	O
apps	O
found	O
on	O
Windows	B-Application
Store	I-Application
;	O
devices	O
are	O
pre-loaded	O
with	O
the	O
in-house	O
Xbox	B-Application
Music	I-Application
and	O
Xbox	B-Application
Video	I-Application
apps	O
.	O
</s>
<s>
All	O
Windows	B-Operating_System
RT	I-Operating_System
devices	O
include	O
Office	B-Operating_System
2013	I-Operating_System
Home	I-Operating_System
&	I-Operating_System
Student	I-Operating_System
RT	I-Operating_System
—	O
a	O
version	O
of	O
Microsoft	B-Application
Office	I-Application
that	O
is	O
optimized	O
for	O
ARM	O
systems	O
.	O
</s>
<s>
As	O
the	O
version	O
of	O
Office	B-Application
RT	O
included	O
on	O
Windows	B-Operating_System
RT	I-Operating_System
devices	O
is	O
based	O
on	O
the	O
Home	O
&	O
Student	O
version	O
,	O
it	O
cannot	O
be	O
used	O
for	O
"	O
commercial	O
,	O
nonprofit	O
,	O
or	O
revenue-generating	O
activities	O
"	O
unless	O
the	O
organization	O
has	O
a	O
volume	O
license	O
for	O
Office	B-Operating_System
2013	I-Operating_System
,	O
or	O
the	O
user	O
has	O
an	O
Office	B-Operating_System
365	I-Operating_System
subscription	O
with	O
commercial	O
use	O
rights	O
.	O
</s>
<s>
For	O
compatibility	O
and	O
security	O
reasons	O
,	O
certain	O
advanced	O
features	O
,	O
such	O
as	O
Visual	B-Language
Basic	I-Language
macros	I-Language
,	O
are	O
not	O
available	O
in	O
Office	B-Application
RT	O
.	O
</s>
<s>
Windows	B-Operating_System
RT	I-Operating_System
also	O
includes	O
a	O
BitLocker-based	O
device	O
encryption	O
system	O
,	O
which	O
passively	O
encrypts	O
a	O
user	O
's	O
data	O
once	O
they	O
sign	O
in	O
with	O
a	O
Microsoft	O
account	O
.	O
</s>
<s>
Due	O
to	O
the	O
different	O
architecture	B-General_Concept
of	O
ARM-based	O
devices	O
compared	O
to	O
x86	O
devices	O
,	O
Windows	B-Operating_System
RT	I-Operating_System
has	O
software	O
compatibility	O
limitations	O
.	O
</s>
<s>
Although	O
the	O
operating	O
system	O
still	O
provides	O
the	O
traditional	O
Windows	O
desktop	O
environment	O
alongside	O
Windows	B-Application
8	I-Application
's	O
touch-oriented	O
user	B-Operating_System
interface	I-Operating_System
,	O
the	O
only	O
desktop	O
applications	O
officially	O
supported	O
by	O
Windows	B-Operating_System
RT	I-Operating_System
are	O
those	O
that	O
come	O
with	O
the	O
operating	O
system	O
itself	O
;	O
such	O
as	O
File	B-Protocol
Explorer	I-Protocol
,	O
Internet	B-Application
Explorer	I-Application
,	O
and	O
Office	B-Application
RT	O
.	O
</s>
<s>
Only	O
Windows	B-Application
Store	I-Application
apps	O
can	O
be	O
installed	O
by	O
users	O
on	O
Windows	B-Operating_System
RT	I-Operating_System
devices	O
;	O
they	O
must	O
be	O
obtained	O
from	O
Windows	B-Application
Store	I-Application
or	O
sideloaded	O
in	O
enterprise	O
environments	O
.	O
</s>
<s>
Developers	O
cannot	O
port	O
desktop	O
applications	O
to	O
run	O
on	O
Windows	B-Operating_System
RT	I-Operating_System
since	O
Microsoft	O
developers	O
felt	O
that	O
they	O
would	O
not	O
be	O
properly	O
optimized	O
for	O
the	O
platform	O
.	O
</s>
<s>
As	O
a	O
consequence	O
,	O
Windows	B-Operating_System
RT	I-Operating_System
also	O
does	O
not	O
support	O
"	O
new-experience	O
enabled	O
"	O
web	B-Application
browsers	I-Application
:	O
a	O
special	O
class	O
of	O
app	O
used	O
on	O
Windows	B-Application
8	I-Application
that	O
allows	O
web	B-Application
browsers	I-Application
to	O
bundle	O
variants	O
that	O
can	O
run	O
in	O
the	O
Windows	B-Operating_System
RT	I-Operating_System
"	O
modern-style	O
user	B-Operating_System
interface	I-Operating_System
"	O
and	O
integrate	O
with	O
other	O
apps	O
but	O
still	O
use	O
Win32	B-Library
code	O
like	O
desktop	O
programs	O
.	O
</s>
<s>
In	O
a	O
presentation	O
at	O
Windows	B-Application
8	I-Application
's	O
launch	O
event	O
in	O
New	O
York	O
City	O
,	O
Steven	O
Sinofsky	O
claimed	O
that	O
Windows	B-Operating_System
RT	I-Operating_System
would	O
support	O
420	O
million	O
existing	O
hardware	O
devices	O
and	O
peripherals	O
.	O
</s>
<s>
However	O
,	O
in	O
comparison	O
to	O
Windows	B-Application
8	I-Application
,	O
full	O
functionality	O
will	O
not	O
be	O
available	O
for	O
all	O
devices	O
,	O
and	O
some	O
devices	O
will	O
not	O
be	O
supported	O
at	O
all	O
.	O
</s>
<s>
Microsoft	O
provides	O
a	O
"	O
Compatibility	O
Center	O
"	O
portal	O
where	O
users	O
can	O
search	O
for	O
compatibility	O
information	O
on	O
devices	O
with	O
Windows	B-Operating_System
RT	I-Operating_System
;	O
on	O
launch	O
,	O
the	O
site	O
listed	O
just	O
over	O
30,000	O
devices	O
that	O
were	O
compatible	O
with	O
the	O
operating	O
system	O
.	O
</s>
<s>
While	O
Windows	B-Operating_System
RT	I-Operating_System
devices	O
can	O
join	O
a	O
HomeGroup	O
and	O
access	O
files	O
stored	O
within	O
shared	O
folders	O
and	O
libraries	O
on	O
other	O
devices	O
within	O
the	O
group	O
,	O
files	O
cannot	O
be	O
shared	O
from	O
the	O
Windows	B-Operating_System
RT	I-Operating_System
device	O
itself	O
.	O
</s>
<s>
Windows	B-Operating_System
RT	I-Operating_System
does	O
not	O
support	O
connecting	O
to	O
a	O
domain	B-General_Concept
for	O
network	O
logins	O
,	O
nor	O
does	O
it	O
support	O
using	O
Group	O
Policy	O
for	O
device	O
management	O
.	O
</s>
<s>
However	O
,	O
Exchange	B-Protocol
ActiveSync	I-Protocol
,	O
the	O
Windows	B-Application
Intune	I-Application
service	O
,	O
or	O
System	B-Protocol
Center	I-Protocol
Configuration	I-Protocol
Manager	I-Protocol
2012	O
SP1	O
can	O
be	O
used	O
to	O
provide	O
some	O
control	O
over	O
Windows	B-Operating_System
RT	I-Operating_System
devices	O
in	O
enterprise	O
environments	O
,	O
such	O
as	O
the	O
ability	O
to	O
apply	O
security	O
policies	O
and	O
provide	O
a	O
portal	O
which	O
can	O
be	O
used	O
to	O
sideload	O
apps	O
from	O
outside	O
Windows	B-Application
Store	I-Application
.	O
</s>
<s>
After	O
installation	O
of	O
the	O
KB3033055	O
update	O
for	O
Windows	B-Operating_System
RT	I-Operating_System
8.1	B-Device
,	O
a	O
desktop	O
Start	O
menu	O
becomes	O
available	O
as	O
an	O
alternative	O
to	O
the	O
Start	O
screen	O
.	O
</s>
<s>
It	O
is	O
similar	O
to	O
,	O
but	O
not	O
identical	O
to	O
,	O
Windows	B-Operating_System
10	I-Operating_System
's	O
version	O
.	O
</s>
<s>
Windows	B-Operating_System
RT	I-Operating_System
follows	O
the	O
lifecycle	O
policy	O
of	O
Windows	B-Application
8	I-Application
and	O
Windows	B-Device
8.1	I-Device
.	O
</s>
<s>
The	O
original	B-Device
Surface	I-Device
tablet	I-Device
fell	O
under	O
Microsoft	O
's	O
support	O
policies	O
for	O
consumer	O
hardware	O
and	O
received	O
mainstream	O
support	O
until	O
April	O
11	O
,	O
2017	O
.	O
</s>
<s>
Mainstream	O
support	O
for	O
Windows	B-Operating_System
RT	I-Operating_System
(	O
8.0	O
)	O
ended	O
on	O
January	O
12	O
,	O
2016	O
.	O
</s>
<s>
Users	O
must	O
have	O
updated	O
to	O
Windows	B-Operating_System
RT	I-Operating_System
8.1	B-Device
which	O
continued	O
receiving	O
support	O
until	O
the	O
dates	O
mentioned	O
below	O
.	O
</s>
<s>
Mainstream	O
support	O
for	O
Windows	B-Operating_System
RT	I-Operating_System
8.1	B-Device
ended	O
on	O
January	O
9	O
,	O
2018	O
,	O
and	O
extended	O
support	O
for	O
Windows	B-Operating_System
RT	I-Operating_System
8.1	B-Device
ended	O
on	O
January	O
10	O
,	O
2023	O
.	O
</s>
<s>
Microsoft	O
imposed	O
tight	O
control	O
on	O
the	O
development	O
and	O
production	O
of	O
Windows	B-Operating_System
RT	I-Operating_System
devices	O
:	O
they	O
were	O
designed	O
in	O
cooperation	O
with	O
the	O
company	O
,	O
and	O
built	O
to	O
strict	O
design	O
and	O
hardware	O
specifications	O
,	O
including	O
requirements	O
to	O
only	O
use	O
"	O
approved	O
"	O
models	O
of	O
certain	O
components	O
.	O
</s>
<s>
To	O
ensure	O
hardware	O
quality	O
and	O
control	O
the	O
number	O
of	O
devices	O
released	O
upon	O
launch	O
,	O
the	O
three	O
participating	O
ARM	B-Architecture
chip	I-Architecture
makers	O
were	O
only	O
allowed	O
to	O
partner	O
with	O
up	O
to	O
two	O
PC	O
manufacturers	O
to	O
develop	O
the	O
first	O
"	O
wave	O
"	O
of	O
Windows	B-Operating_System
RT	I-Operating_System
devices	O
in	O
Microsoft	O
's	O
development	O
program	O
.	O
</s>
<s>
Qualcomm	O
partnered	O
with	O
Samsung	B-Application
and	O
HP	O
,	O
Nvidia	O
with	O
Asus	O
and	O
Lenovo	O
,	O
and	O
Texas	O
Instruments	O
with	O
Toshiba	O
.	O
</s>
<s>
Additionally	O
,	O
Microsoft	O
partnered	O
with	O
Nvidia	O
to	O
produce	O
Surface	B-Device
(	O
retroactively	O
renamed	O
"	O
Surface	B-Device
RT	I-Device
"	O
)	O
–	O
the	O
first	O
Windows-based	O
computing	O
device	O
to	O
be	O
manufactured	O
and	O
marketed	O
directly	O
by	O
Microsoft	O
.	O
</s>
<s>
Windows	B-Operating_System
RT	I-Operating_System
was	O
designed	O
to	O
support	O
chips	O
meeting	O
the	O
ARMv7	O
architecture	B-General_Concept
,	O
a	O
32-bit	O
processor	O
platform	O
.	O
</s>
<s>
Shortly	O
after	O
the	O
original	O
release	O
of	O
Windows	B-Operating_System
RT	I-Operating_System
,	O
ARM	O
Holdings	O
disclosed	O
that	O
it	O
was	O
working	O
with	O
Microsoft	O
and	O
other	O
software	O
partners	O
on	O
supporting	O
64-bit	B-Device
AArch64	B-Architecture
.	O
</s>
<s>
Multiple	O
hardware	O
partners	O
pulled	O
out	O
of	O
the	O
program	O
during	O
the	O
development	O
of	O
Windows	B-Operating_System
RT	I-Operating_System
,	O
the	O
first	O
being	O
Toshiba	O
and	O
Texas	O
Instruments	O
.	O
</s>
<s>
TI	O
later	O
announced	O
that	O
it	O
was	O
pulling	O
out	O
of	O
the	O
consumer	O
market	O
for	O
ARM	O
system-on-chips	O
to	O
focus	O
on	O
embedded	B-Architecture
systems	I-Architecture
.	O
</s>
<s>
Acer	O
also	O
intended	O
to	O
release	O
a	O
Windows	B-Operating_System
RT	I-Operating_System
device	O
alongside	O
its	O
Windows	O
8-based	O
products	O
,	O
but	O
initially	O
decided	O
to	O
delay	O
it	O
until	O
the	O
second	O
quarter	O
of	O
2013	O
in	O
response	O
to	O
the	O
mixed	O
reaction	O
to	O
Surface	B-Device
.	O
</s>
<s>
The	O
unveiling	O
of	O
the	O
Microsoft-developed	O
tablet	O
caught	O
Acer	O
by	O
surprise	O
,	O
leading	O
to	O
concerns	O
that	O
Surface	B-Device
could	O
leave	O
"	O
a	O
huge	O
negative	O
impact	O
for	O
the	O
 [ Windows ] 	O
ecosystem	O
and	O
other	O
brands.	O
"	O
</s>
<s>
The	O
first	O
wave	O
of	O
Windows	B-Operating_System
RT	I-Operating_System
devices	O
included	O
:	O
</s>
<s>
After	O
having	O
planned	O
to	O
produce	O
a	O
Windows	B-Operating_System
RT	I-Operating_System
device	O
close	O
to	O
its	O
launch	O
,	O
Acer	O
's	O
president	O
Jim	O
Wong	O
later	O
indicated	O
that	O
there	O
was	O
"	O
no	O
value	O
"	O
in	O
the	O
current	O
version	O
of	O
the	O
operating	O
system	O
,	O
and	O
would	O
reconsider	O
its	O
plans	O
for	O
future	O
Windows	B-Operating_System
RT	I-Operating_System
products	O
when	O
the	O
Windows	B-Device
8.1	I-Device
update	O
was	O
released	O
.	O
</s>
<s>
On	O
August	O
9	O
,	O
2013	O
,	O
Asus	O
announced	O
that	O
it	O
would	O
no	O
longer	O
produce	O
any	O
Windows	B-Operating_System
RT	I-Operating_System
products	O
;	O
chairman	O
Johnny	O
Shih	O
expressed	O
displeasure	O
at	O
the	O
market	O
performance	O
of	O
Windows	B-Operating_System
RT	I-Operating_System
,	O
considering	O
it	O
to	O
be	O
"	O
not	O
very	O
promising	O
"	O
.	O
</s>
<s>
During	O
the	O
introduction	O
of	O
its	O
Android	B-Application
and	O
Windows	O
8-based	O
Venue	O
tablets	O
in	O
October	O
2013	O
,	O
Dell	O
's	O
vice	O
president	O
Neil	O
Hand	O
stated	O
that	O
the	O
company	O
had	O
no	O
plans	O
to	O
produce	O
an	O
updated	O
version	O
of	O
the	O
XPS	O
10	O
.	O
</s>
<s>
In	O
September	O
2013	O
,	O
Nvidia	O
CEO	O
Jen-Hsun	O
Huang	O
stated	O
that	O
the	O
company	O
was	O
"	O
working	O
really	O
hard	O
"	O
with	O
Microsoft	O
on	O
developing	O
a	O
second	O
revision	O
of	O
Surface	B-Device
.	O
</s>
<s>
The	O
Microsoft	B-Device
Surface	I-Device
2	I-Device
tablet	O
,	O
which	O
is	O
powered	O
by	O
Nvidia	O
's	O
quad-core	O
Tegra	O
4	O
platform	O
and	O
features	O
the	O
same	O
full	O
HD	O
display	O
as	O
the	O
Surface	B-Device
Pro	I-Device
2	I-Device
,	O
was	O
officially	O
unveiled	O
on	O
September	O
23	O
,	O
2013	O
,	O
and	O
released	O
on	O
October	O
22	O
,	O
2013	O
,	O
following	O
Windows	B-Device
8.1	I-Device
general	O
availability	O
the	O
previous	O
week	O
.	O
</s>
<s>
On	O
the	O
same	O
day	O
as	O
the	O
Surface	B-Device
2	I-Device
's	O
release	O
,	O
Nokia	O
(	O
the	O
acquisition	O
of	O
their	O
mobile	O
business	O
by	O
Microsoft	O
had	O
just	O
been	O
announced	O
,	O
but	O
not	O
yet	O
been	O
completed	O
)	O
unveiled	O
the	O
Lumia	B-Device
2520	I-Device
,	O
a	O
Windows	B-Operating_System
RT	I-Operating_System
tablet	O
with	O
a	O
Qualcomm	B-Architecture
Snapdragon	I-Architecture
800	O
processor	O
,	O
4G	O
LTE	O
,	O
and	O
a	O
design	O
similar	O
to	O
its	O
line	B-Device
of	O
Windows	B-Protocol
Phone	I-Protocol
products	O
.	O
</s>
<s>
An	O
LTE-capable	O
version	O
of	O
the	O
Surface	B-Device
2	I-Device
was	O
made	O
available	O
the	O
following	O
year	O
.	O
</s>
<s>
In	O
January	O
2015	O
,	O
after	O
its	O
stock	O
sold	O
out	O
on	O
Microsoft	B-Application
Store	I-Application
online	I-Application
,	O
Microsoft	O
confirmed	O
that	O
it	O
had	O
discontinued	O
further	O
production	O
of	O
the	O
Surface	B-Device
2	I-Device
to	O
focus	O
on	O
Surface	B-Device
Pro	O
products	O
.	O
</s>
<s>
Microsoft	O
ended	O
production	O
of	O
the	O
Lumia	B-Device
2520	I-Device
the	O
following	O
month	O
,	O
ending	O
active	O
production	O
of	O
Windows	B-Operating_System
RT	I-Operating_System
devices	O
after	O
just	O
over	O
two	O
years	O
of	O
general	O
availability	O
.	O
</s>
<s>
With	O
the	O
end	O
of	O
production	O
for	O
both	O
Surface	B-Device
2	I-Device
and	O
Lumia	B-Device
2520	I-Device
,	O
Microsoft	O
and	O
its	O
subsidiaries	O
no	O
longer	O
manufacture	O
any	O
Windows	B-Operating_System
RT	I-Operating_System
devices	O
.	O
</s>
<s>
Microsoft	O
originally	O
developed	O
a	O
"	O
mini	O
"	O
version	O
of	O
its	O
Surface	B-Device
tablet	I-Device
later	O
known	O
as	O
Surface	B-Device
Mini	I-Device
and	O
had	O
planned	O
to	O
unveil	O
it	O
alongside	O
the	O
Surface	B-Device
Pro	I-Device
3	I-Device
in	O
May	O
2014	O
;	O
it	O
was	O
reportedly	O
cancelled	O
at	O
the	O
last	O
minute	O
.	O
</s>
<s>
Images	O
of	O
the	O
product	O
were	O
leaked	O
in	O
June	O
2017	O
,	O
revealing	O
specifications	O
such	O
as	O
a	O
Qualcomm	B-Architecture
Snapdragon	I-Architecture
800	O
,	O
an	O
8-inch	O
display	O
,	O
and	O
support	O
for	O
the	O
Surface	B-Device
Pen	I-Device
instead	O
of	O
a	O
keyboard	B-Device
attachment	I-Device
.	O
</s>
<s>
Details	O
revealed	O
in	O
September	O
2017	O
showed	O
the	O
product	O
to	O
have	O
an	O
8.3-inch	O
display	O
and	O
the	O
same	O
Snapdragon	B-Architecture
800	O
chip	O
as	O
that	O
of	O
the	O
Surface	B-Device
"	O
mini	O
"	O
tablet	O
.	O
</s>
<s>
Windows	B-Operating_System
RT	I-Operating_System
's	O
launch	O
devices	O
received	O
mixed	O
reviews	O
upon	O
their	O
release	O
.	O
</s>
<s>
In	O
a	O
review	O
of	O
the	O
Asus	O
VivoTab	O
RT	O
by	O
PC	O
Advisor	O
,	O
Windows	B-Operating_System
RT	I-Operating_System
was	O
praised	O
for	O
being	O
a	O
mobile	B-Operating_System
operating	I-Operating_System
system	I-Operating_System
that	O
still	O
offered	O
some	O
PC	O
amenities	O
such	O
as	O
a	O
full-featured	O
file	B-Application
manager	I-Application
,	O
but	O
noted	O
its	O
lack	O
of	O
compatibility	O
with	O
existing	O
Windows	O
software	O
,	O
and	O
that	O
it	O
had	O
no	O
proper	O
media	B-Device
player	I-Device
aside	O
from	O
a	O
"	O
shameless	O
,	O
in-your-face	O
conduit	O
to	O
Xbox	O
Music.	O
"	O
</s>
<s>
AnandTech	O
believed	O
Windows	B-Operating_System
RT	I-Operating_System
was	O
the	O
first	O
"	O
legitimately	O
useful	O
"	O
mobile	B-Operating_System
operating	I-Operating_System
system	I-Operating_System
,	O
owing	O
in	O
part	O
to	O
its	O
multitasking	O
system	O
,	O
bundled	O
Office	B-Application
programs	O
,	O
smooth	O
interface	O
performance	O
,	O
and	O
"	O
decent	O
"	O
support	O
for	O
a	O
wider	O
variety	O
of	O
USB	B-Protocol
devices	I-Protocol
in	O
comparison	O
to	O
other	O
operating	O
systems	O
on	O
the	O
ARM	B-Architecture
architecture	I-Architecture
.	O
</s>
<s>
However	O
,	O
the	O
OS	O
was	O
panned	O
for	O
its	O
slow	O
application	O
launch	O
times	O
in	O
comparison	O
to	O
a	O
recent	B-Operating_System
iPad	I-Operating_System
,	O
and	O
spotty	O
driver	O
support	O
for	O
printers	O
.	O
</s>
<s>
Reception	O
of	O
the	O
preview	O
release	O
of	O
RT	O
8.1	B-Device
was	O
mixed	O
;	O
both	O
ExtremeTech	O
and	O
TechRadar	O
praised	O
the	O
improvements	O
to	O
the	O
operating	O
system	O
's	O
tablet-oriented	O
interface	O
,	O
along	O
with	O
the	O
addition	O
of	O
Outlook	B-Application
;	O
TechRadars	O
Dan	O
Grabham	O
believed	O
that	O
the	O
inclusion	O
of	O
Outlook	B-Application
was	O
important	O
because	O
"	O
nobody	O
in	O
their	O
right	O
mind	O
would	O
try	O
and	O
handle	O
work	O
email	O
inside	O
the	O
standard	O
Mail	O
it	O
's	O
just	O
not	O
up	O
to	O
the	O
task.	O
"	O
</s>
<s>
However	O
,	O
both	O
experienced	O
performance	O
issues	O
running	O
the	O
beta	O
on	O
the	O
Tegra	O
3-based	O
Surface	B-Device
;	O
ExtremeTech	O
concluded	O
that	O
"	O
as	O
it	O
stands	O
,	O
we	O
’re	O
still	O
not	O
sure	O
why	O
you	O
would	O
ever	O
opt	O
to	O
buy	O
a	O
Windows	B-Operating_System
RT	I-Operating_System
tablet	O
when	O
there	O
are	O
similarly	O
priced	O
Atom-powered	O
x86	O
devices	O
that	O
run	O
the	O
full	O
version	O
of	O
Windows	O
8.	O
"	O
</s>
<s>
The	O
need	O
to	O
market	O
an	O
ARM-compatible	O
version	O
of	O
Windows	O
was	O
questioned	O
by	O
analysts	O
because	O
of	O
recent	O
developments	O
in	O
the	O
PC	O
industry	O
;	O
both	O
Intel	O
and	O
AMD	O
introduced	O
x86-based	O
system-on-chip	B-Architecture
designs	O
for	O
Windows	B-Application
8	I-Application
,	O
Atom	B-Application
"	I-Application
Clover	I-Application
Trail	I-Application
"	I-Application
and	O
"	O
Temash	O
"	O
respectively	O
,	O
in	O
response	O
to	O
the	O
growing	O
competition	O
from	O
ARM	O
licensees	O
.	O
</s>
<s>
In	O
particular	O
,	O
Intel	O
claimed	O
that	O
Clover	O
Trail-based	O
tablets	O
could	O
provide	O
battery	O
life	O
rivaling	O
that	O
of	O
ARM	O
devices	O
;	O
in	O
a	O
test	O
by	O
PC	O
World	O
,	O
Samsung	B-Application
's	O
Clover	O
Trail-based	O
Ativ	O
Smart	O
PC	O
was	O
shown	O
to	O
have	O
battery	O
life	O
exceeding	O
that	O
of	O
the	O
ARM-based	O
Surface	B-Device
.	O
</s>
<s>
Peter	O
Bright	O
of	O
Ars	O
Technica	O
argued	O
that	O
Windows	B-Operating_System
RT	I-Operating_System
had	O
no	O
clear	O
purpose	O
,	O
since	O
the	O
power	O
advantage	O
of	O
ARM-based	O
devices	O
was	O
"	O
nowhere	O
near	O
as	O
clear-cut	O
as	O
it	O
was	O
two	O
years	O
ago	O
"	O
,	O
and	O
that	O
users	O
would	O
be	O
better	O
off	O
purchasing	O
Office	B-Operating_System
2013	I-Operating_System
themselves	O
because	O
of	O
the	O
removed	O
features	O
and	O
licensing	O
restrictions	O
of	O
Office	B-Application
RT	O
.	O
</s>
<s>
Windows	B-Operating_System
RT	I-Operating_System
was	O
also	O
met	O
with	O
lukewarm	O
reaction	O
from	O
manufacturers	O
;	O
in	O
June	O
2012	O
,	O
Hewlett-Packard	O
canceled	O
its	O
plans	O
to	O
release	O
a	O
Windows	B-Operating_System
RT	I-Operating_System
tablet	O
,	O
stating	O
that	O
its	O
customers	O
felt	O
Intel-based	O
tablets	O
were	O
more	O
appropriate	O
for	O
use	O
in	O
business	O
environments	O
.	O
</s>
<s>
In	O
January	O
2013	O
,	O
Samsung	B-Application
cancelled	O
the	O
American	O
release	O
of	O
its	O
Windows	B-Operating_System
RT	I-Operating_System
tablet	O
,	O
the	O
Ativ	B-Device
Tab	I-Device
,	O
citing	O
the	O
unclear	O
positioning	O
of	O
the	O
operating	O
system	O
,	O
"	O
modest	O
"	O
demand	O
for	O
Windows	B-Operating_System
RT	I-Operating_System
devices	O
,	O
plus	O
the	O
effort	O
and	O
investment	O
required	O
to	O
educate	O
consumers	O
on	O
the	O
differences	O
between	O
Windows	B-Application
8	I-Application
and	O
RT	O
as	O
reasons	O
for	O
the	O
move	O
.	O
</s>
<s>
Mike	O
Abary	O
,	O
senior	O
vice	O
president	O
of	O
Samsung	B-Application
's	O
U.S.	O
PC	O
and	O
tablet	O
businesses	O
,	O
also	O
stated	O
that	O
the	O
company	O
was	O
unable	O
to	O
build	O
the	O
Ativ	B-Device
Tab	I-Device
to	O
meet	O
its	O
target	O
price	O
point	O
—	O
considering	O
that	O
lower	O
cost	O
was	O
intended	O
to	O
be	O
a	O
selling	O
point	O
for	O
Windows	B-Operating_System
RT	I-Operating_System
devices	O
.	O
</s>
<s>
Nvidia	O
CEO	O
Jen-Hsun	O
Huang	O
expressed	O
disappointment	O
over	O
the	O
market	O
performance	O
of	O
Windows	B-Operating_System
RT	I-Operating_System
,	O
but	O
called	O
on	O
Microsoft	O
to	O
continue	O
increasing	O
its	O
concentration	O
on	O
the	O
ARM	O
platform	O
.	O
</s>
<s>
Huang	O
also	O
commented	O
on	O
the	O
exclusion	O
of	O
Outlook	B-Application
from	O
the	O
Office	B-Operating_System
2013	I-Operating_System
suite	O
included	O
on	O
the	O
device	O
and	O
suggested	O
that	O
Microsoft	O
port	O
the	O
software	O
for	O
RT	O
as	O
well	O
(	O
in	O
response	O
to	O
public	O
demand	O
,	O
Microsoft	O
announced	O
the	O
inclusion	O
of	O
Outlook	B-Application
with	O
future	O
versions	O
of	O
Windows	B-Operating_System
RT	I-Operating_System
in	O
June	O
2013	O
)	O
.	O
</s>
<s>
In	O
May	O
2013	O
,	O
reports	O
surfaced	O
that	O
HTC	B-Application
had	O
scrapped	O
plans	O
to	O
produce	O
a	O
12-inch	O
Windows	B-Operating_System
RT	I-Operating_System
tablet	O
as	O
it	O
would	O
cost	O
too	O
much	O
to	O
produce	O
,	O
and	O
that	O
there	O
would	O
be	O
greater	O
demand	O
for	O
smaller	O
devices	O
.	O
</s>
<s>
The	O
poor	O
demand	O
resulted	O
in	O
price	O
cuts	O
for	O
various	O
Windows	B-Operating_System
RT	I-Operating_System
products	O
;	O
in	O
April	O
2013	O
the	O
price	O
of	O
Dell	O
's	O
XPS	O
10	O
fell	O
from	O
US$450	O
US	O
to	O
$300	O
,	O
and	O
Microsoft	O
began	O
offering	O
free	O
covers	O
for	O
its	O
Surface	B-Device
tablet	I-Device
in	O
some	O
territories	O
as	O
a	O
limited-time	O
promotion	O
—	O
itself	O
a	O
US$130	O
value	O
for	O
the	O
Type	O
Cover	O
alone	O
.	O
</s>
<s>
Microsoft	O
also	O
reportedly	O
reduced	O
the	O
cost	O
of	O
Windows	B-Operating_System
RT	I-Operating_System
licenses	O
for	O
devices	O
with	O
smaller	O
screens	O
,	O
hoping	O
that	O
this	O
could	O
spur	O
interest	O
in	O
the	O
platform	O
.	O
</s>
<s>
In	O
July	O
2013	O
,	O
Microsoft	O
cut	O
the	O
price	O
of	O
the	O
first-generation	O
Surface	B-Device
worldwide	O
by	O
30%	O
,	O
with	O
its	O
U.S.	O
price	O
falling	O
to	O
$350	O
.	O
</s>
<s>
Microsoft	O
's	O
discount	O
on	O
the	O
Surface	B-Device
tablet	I-Device
did	O
result	O
in	O
a	O
slight	O
increase	O
of	O
market	O
share	O
for	O
the	O
device	O
;	O
in	O
late-August	O
2013	O
,	O
usage	O
data	O
from	O
the	O
advertising	O
network	O
AdDuplex	B-Application
(	O
which	O
provides	O
advertising	O
services	O
within	O
Windows	B-Application
Store	I-Application
apps	O
)	O
revealed	O
that	O
Surface	B-Device
usage	O
had	O
increased	O
from	O
6.2	O
to	O
9.8	O
%	O
.	O
</s>
<s>
In	O
contrast	O
to	O
Windows	B-Application
8	I-Application
(	O
where	O
the	O
feature	O
had	O
to	O
be	O
enabled	O
by	O
default	O
on	O
OEM	O
devices	O
,	O
but	O
remain	O
user-configurable	O
)	O
,	O
Microsoft	O
requires	O
all	O
Windows	B-Operating_System
RT	I-Operating_System
devices	O
to	O
have	O
UEFI	B-Architecture
Secure	O
Boot	O
permanently	O
enabled	O
,	O
preventing	O
the	O
ability	O
to	O
run	O
alternative	O
operating	O
systems	O
on	O
them	O
.	O
</s>
<s>
Tom	O
Warren	O
of	O
The	O
Verge	O
stated	O
that	O
he	O
would	O
have	O
preferred	O
Microsoft	O
to	O
"	O
keep	O
a	O
consistent	O
approach	O
across	O
ARM	O
and	O
x86	O
,	O
though	O
,	O
not	O
least	O
because	O
of	O
the	O
number	O
of	O
users	O
who	O
'd	O
love	O
to	O
run	O
Android	B-Application
alongside	O
Windows	B-Application
8	I-Application
on	O
their	O
future	O
tablets	O
"	O
,	O
but	O
noted	O
that	O
the	O
decision	O
to	O
impose	O
such	O
restrictions	O
was	O
in	O
line	B-Device
with	O
similar	O
measures	O
imposed	O
by	O
other	O
mobile	B-Operating_System
operating	I-Operating_System
systems	I-Operating_System
,	O
including	O
recent	O
Android	B-Application
devices	O
and	O
Microsoft	O
's	O
own	O
Windows	B-Protocol
Phone	I-Protocol
mobile	B-Operating_System
platform	I-Operating_System
.	O
</s>
<s>
The	O
requirement	O
to	O
obtain	O
most	O
software	O
on	O
Windows	B-Operating_System
RT	I-Operating_System
through	O
Windows	B-Application
Store	I-Application
was	O
considered	O
to	O
be	O
similar	O
in	O
nature	O
to	O
the	O
application	O
stores	O
on	O
other	O
"	O
closed	B-Application
"	O
mobile	B-Operating_System
platforms	I-Operating_System
;	O
where	O
only	O
software	O
certified	O
under	O
guidelines	O
issued	O
by	O
the	O
vendor	O
(	O
i.e.	O
</s>
<s>
Microsoft	O
was	O
also	O
criticized	O
by	O
the	O
developers	O
of	O
the	O
Firefox	B-Application
web	I-Application
browser	I-Application
for	O
effectively	O
preventing	O
the	O
development	O
of	O
third-party	O
web	B-Application
browsers	I-Application
for	O
Windows	B-Operating_System
RT	I-Operating_System
(	O
and	O
thus	O
forcing	O
use	O
of	O
its	O
own	O
Internet	B-Application
Explorer	I-Application
browser	B-Application
)	O
by	O
restricting	O
the	O
development	O
of	O
desktop	O
applications	O
and	O
by	O
not	O
providing	O
the	O
same	O
APIs	O
and	O
exceptions	O
available	O
on	O
Windows	B-Application
8	I-Application
to	O
code	O
web	B-Application
browsers	I-Application
that	O
can	O
run	O
as	O
apps	O
.	O
</s>
<s>
As	O
mandated	O
by	O
the	O
EU	O
,	O
the	O
BrowserChoice.eu	O
service	O
is	O
still	O
included	O
in	O
Windows	B-Application
8	I-Application
.	O
</s>
<s>
In	O
January	O
2013	O
,	O
a	O
privilege	O
escalation	O
exploit	O
was	O
discovered	O
in	O
the	O
Windows	O
kernel	O
that	O
can	O
allow	O
unsigned	O
code	O
to	O
run	O
under	O
Windows	B-Operating_System
RT	I-Operating_System
;	O
the	O
exploit	O
involved	O
the	O
use	O
of	O
a	O
remote	B-Application
debugging	I-Application
tool	O
(	O
provided	O
by	O
Microsoft	O
to	O
debug	O
WinRT	O
apps	O
on	O
Windows	B-Operating_System
RT	I-Operating_System
devices	O
)	O
to	O
execute	O
code	O
which	O
changes	O
the	O
signing	O
level	O
stored	O
in	O
RAM	B-Architecture
to	O
allow	O
unsigned	O
code	O
to	O
execute	O
(	O
by	O
default	O
,	O
it	O
is	O
set	O
to	O
a	O
level	O
that	O
only	O
allows	O
code	O
signed	O
by	O
Microsoft	O
to	O
execute	O
)	O
.	O
</s>
<s>
Alongside	O
his	O
explanation	O
of	O
the	O
exploit	O
,	O
the	O
developer	O
also	O
included	O
a	O
personal	O
appeal	O
to	O
Microsoft	O
urging	O
them	O
to	O
remove	O
the	O
restrictions	O
on	O
Windows	B-Operating_System
RT	I-Operating_System
devices	O
,	O
contending	O
that	O
their	O
decision	O
was	O
not	O
for	O
technical	O
reasons	O
,	O
and	O
that	O
the	O
devices	O
would	O
be	O
more	O
valuable	O
if	O
this	O
functionality	O
were	O
available	O
.	O
</s>
<s>
A	O
batch	O
file-based	O
tool	O
soon	O
surfaced	O
on	O
XDA	B-Application
Developers	I-Application
to	O
assist	O
users	O
in	O
the	O
process	O
of	O
performing	O
the	O
exploit	O
,	O
and	O
a	O
variety	O
of	O
ported	O
desktop	O
applications	O
began	O
to	O
emerge	O
,	O
such	O
as	O
the	O
emulator	B-Application
Bochs	B-Language
,	O
PuTTY	B-Operating_System
and	O
TightVNC	B-Language
.	O
</s>
<s>
Afterwards	O
,	O
an	O
emulator	B-Application
known	O
as	O
"	O
Win86emu	O
"	O
surfaced	O
,	O
allowing	O
users	O
to	O
run	O
x86	O
software	O
on	O
a	O
jailbroken	O
Windows	B-Operating_System
RT	I-Operating_System
device	O
.	O
</s>
<s>
However	O
,	O
it	O
does	O
not	O
support	O
all	O
Windows	B-Library
APIs	I-Library
,	O
and	O
runs	O
programs	O
slower	O
than	O
they	O
would	O
on	O
a	O
native	O
system	O
.	O
</s>
<s>
In	O
November	O
2013	O
,	O
speaking	O
about	O
Windows	B-Operating_System
RT	I-Operating_System
at	O
the	O
UBS	O
Global	O
Technology	O
Conference	O
,	O
Julie	O
Larson-Green	O
made	O
comments	O
discussing	O
the	O
future	O
of	O
Microsoft	O
's	O
mobile	O
strategy	O
surrounding	O
the	O
Windows	O
platform	O
.	O
</s>
<s>
Larson-Green	O
stated	O
that	O
in	O
the	O
future	O
(	O
accounting	O
for	O
Windows	O
,	O
Windows	B-Operating_System
RT	I-Operating_System
,	O
and	O
Windows	B-Protocol
Phone	I-Protocol
)	O
,	O
Microsoft	O
was	O
"[not]	O
going	O
to	O
have	O
three	O
[	O
mobile	O
operating	O
systems ]	O
.	O
"	O
</s>
<s>
The	O
fate	O
of	O
Windows	B-Operating_System
RT	I-Operating_System
was	O
left	O
unclear	O
by	O
her	O
remarks	O
;	O
industry	O
analysts	O
interpreted	O
them	O
as	O
signs	O
that	O
Microsoft	O
was	O
preparing	O
to	O
discontinue	O
Windows	B-Operating_System
RT	I-Operating_System
due	O
to	O
its	O
poor	O
adoption	O
,	O
while	O
others	O
suggested	O
that	O
Microsoft	O
was	O
planning	O
to	O
unify	O
Windows	O
with	O
Windows	B-Protocol
Phone	I-Protocol
.	O
</s>
<s>
Microsoft	O
ultimately	O
announced	O
its	O
"	O
Universal	O
Windows	B-Application
Apps	I-Application
"	O
platform	O
at	O
Build	O
2014	O
,	O
which	O
would	O
allow	O
developers	O
to	O
create	O
WinRT	O
apps	O
for	O
Windows	O
,	O
Windows	B-Protocol
Phone	I-Protocol
,	O
and	O
Xbox	B-Device
One	I-Device
that	O
share	O
common	O
codebases	O
.	O
</s>
<s>
These	O
initiatives	O
were	O
compounded	O
by	O
a	O
goal	O
for	O
Windows	B-Operating_System
10	I-Operating_System
to	O
unify	O
the	O
core	O
Windows	O
operating	O
system	O
across	O
all	O
devices	O
.	O
</s>
<s>
Critics	O
interpreted	O
Microsoft	O
's	O
move	O
to	O
cancel	O
the	O
launch	O
of	O
a	O
smaller	O
Surface	B-Device
model	O
in	O
May	O
2014	O
as	O
a	O
further	O
sign	O
that	O
Microsoft	O
,	O
under	O
new	O
CEO	O
Satya	O
Nadella	O
,	O
and	O
new	O
device	O
head	O
Stephen	O
Elop	O
(	O
who	O
joined	O
Microsoft	O
upon	O
the	O
purchase	O
of	O
Nokia	O
's	O
mobile	O
phone	O
business	O
in	O
September	O
2013	O
,	O
only	O
to	O
depart	O
the	O
company	O
the	O
following	O
year	O
)	O
,	O
was	O
planning	O
to	O
further	O
downplay	O
Windows	B-Operating_System
RT	I-Operating_System
,	O
given	O
that	O
the	O
company	O
had	O
shifted	O
its	O
attention	O
towards	O
a	O
higher-end	O
,	O
productivity-oriented	O
market	O
with	O
the	O
Pro	O
3	O
—	O
one	O
which	O
would	O
be	O
inappropriate	O
for	O
Windows	B-Operating_System
RT	I-Operating_System
given	O
its	O
positioning	O
and	O
limitations	O
.	O
</s>
<s>
Analysts	O
believed	O
that	O
Microsoft	O
was	O
planning	O
to	O
leverage	O
its	O
acquisition	O
of	O
Nokia	O
's	O
device	O
business	O
for	O
future	O
Windows	B-Operating_System
RT	I-Operating_System
devices	O
,	O
possibly	O
under	O
the	O
Lumia	O
brand	O
;	O
</s>
<s>
On	O
January	O
21	O
,	O
2015	O
,	O
Microsoft	O
unveiled	O
Windows	B-Operating_System
10	I-Operating_System
Mobile	I-Operating_System
,	O
an	O
edition	O
of	O
Windows	B-Operating_System
10	I-Operating_System
for	O
smartphones	B-Application
and	O
sub-8-inch	O
tablets	O
running	O
on	O
ARM	B-Architecture
architecture	I-Architecture
;	O
unlike	O
RT	O
,	O
which	O
was	O
based	O
upon	O
the	O
user	O
experience	O
of	O
the	O
PC	O
version	O
,	O
Windows	B-Operating_System
10	I-Operating_System
on	O
these	O
devices	O
is	O
a	O
continuation	O
of	O
the	O
Windows	B-Protocol
Phone	I-Protocol
user	O
experience	O
that	O
emphasizes	O
the	O
ability	O
for	O
developers	O
to	O
create	O
"	O
universal	O
"	O
Windows	B-Application
apps	I-Application
that	O
can	O
run	O
across	O
PCs	O
,	O
tablets	O
,	O
and	O
phones	O
,	O
and	O
only	O
supports	O
the	O
modern-style	O
interface	O
and	O
Windows	B-Application
apps	I-Application
(	O
although	O
on	O
compatible	O
devices	O
,	O
a	O
limited	O
desktop	O
experience	O
will	O
be	O
available	O
when	O
connected	O
to	O
an	O
external	O
display	O
)	O
.	O
</s>
<s>
Following	O
the	O
event	O
,	O
a	O
Microsoft	O
spokesperson	O
stated	O
that	O
the	O
company	O
was	O
working	O
on	O
a	O
Windows	B-Operating_System
RT	I-Operating_System
update	O
that	O
would	O
provide	O
"	O
some	O
of	O
the	O
functionality	O
of	O
Windows	B-Operating_System
10	I-Operating_System
"	O
,	O
and	O
the	O
company	O
ended	O
production	O
of	O
both	O
the	O
Surface	B-Device
2	I-Device
and	O
Lumia	B-Device
2520	I-Device
.	O
</s>
<s>
Newer	O
Intel	O
processors	O
for	O
mobile	O
devices	O
were	O
more	O
competitive	O
in	O
comparison	O
to	O
ARM	O
equivalents	O
in	O
regards	O
to	O
performance	O
and	O
battery	O
life	O
;	O
this	O
factor	O
and	O
other	O
changes	O
made	O
by	O
Microsoft	O
,	O
such	O
as	O
the	O
removal	O
of	O
Windows	O
OEM	O
license	O
fees	O
on	O
devices	O
with	O
screens	O
less	O
than	O
9	O
inches	O
in	O
size	O
,	O
spurred	O
the	O
creation	O
of	O
a	O
market	O
for	O
lower-end	O
tablets	O
running	O
the	O
full	O
Windows	B-Application
8	I-Application
operating	O
system	O
on	O
Intel-compatible	O
platforms	O
,	O
leaving	O
further	O
uncertainty	O
over	O
Microsoft	O
's	O
support	O
of	O
ARM	O
outside	O
of	O
smartphones	B-Application
—	O
where	O
they	O
remain	O
ubiquitous	O
.	O
</s>
<s>
Such	O
a	O
device	O
came	O
in	O
March	O
2015	O
,	O
when	O
Microsoft	O
unveiled	O
a	O
new	O
low-end	O
Surface	B-Device
model	O
,	O
the	O
Intel	O
Atom-based	O
Surface	B-Device
3	I-Device
;	O
unlike	O
previous	O
low-end	O
Surface	B-Device
models	O
,	O
Surface	B-Device
3	I-Device
did	O
not	O
use	O
ARM	O
and	O
Windows	B-Operating_System
RT	I-Operating_System
.	O
</s>
<s>
It	O
was	O
succeeded	O
in	O
2018	O
by	O
the	O
Pentium	B-Device
Gold	I-Device
Surface	B-Device
Go	I-Device
.	O
</s>
<s>
Windows	B-Device
8.1	I-Device
RT	O
Update	O
3	O
(	O
KB3033055	O
)	O
was	O
released	O
on	O
September	O
16	O
,	O
2015	O
;	O
it	O
adds	O
a	O
version	O
of	O
the	O
updated	O
Start	O
menu	O
seen	O
in	O
early	O
preview	O
versions	O
of	O
Windows	B-Operating_System
10	I-Operating_System
(	O
which	O
combines	O
an	O
application	O
list	O
with	O
a	O
sidebar	O
of	O
tiles	O
)	O
,	O
but	O
otherwise	O
does	O
not	O
contain	O
any	O
other	O
significant	O
changes	O
to	O
the	O
operating	O
system	O
or	O
its	O
functionality	O
,	O
nor	O
any	O
support	O
for	O
Windows	B-Operating_System
10	I-Operating_System
's	O
application	O
ecosystem	O
.	O
</s>
<s>
The	O
Verge	O
characterized	O
this	O
update	O
as	O
being	O
similar	O
to	O
Windows	B-Protocol
Phone	I-Protocol
7.8	O
—	O
which	O
similarly	O
backported	O
user	B-Operating_System
interface	I-Operating_System
changes	O
from	O
Windows	B-Protocol
Phone	I-Protocol
8	O
(	O
which	O
switched	O
from	O
a	O
Windows	O
Mobile-derived	O
platform	O
to	O
one	O
derived	O
from	O
the	O
NT	O
kernel	O
)	O
,	O
without	O
making	O
any	O
other	O
significant	O
upgrades	O
to	O
the	O
platform	O
.	O
</s>
<s>
On	O
December	O
7	O
,	O
2016	O
,	O
Microsoft	O
announced	O
that	O
as	O
part	O
of	O
a	O
partnership	O
with	O
Qualcomm	O
,	O
it	O
planned	O
to	O
launch	O
an	O
ARM	O
version	O
of	O
Windows	B-Operating_System
10	I-Operating_System
for	O
Snapdragon-based	O
devices	O
,	O
initially	O
focusing	O
on	O
laptops	O
.	O
</s>
<s>
Unlike	O
Windows	B-Operating_System
RT	I-Operating_System
,	O
the	O
ARM	O
version	O
of	O
Windows	B-Operating_System
10	I-Operating_System
supports	O
using	O
an	O
emulation	B-Application
layer	O
to	O
run	O
software	O
compiled	O
for	O
32-bit	O
x86	O
architectures	O
.	O
</s>
<s>
The	O
following	O
year	O
,	O
Microsoft	O
announced	O
the	O
Always	O
Connected	O
PC	O
brand	O
,	O
covering	O
Windows	B-Operating_System
10	I-Operating_System
devices	O
with	O
cellular	O
connectivity	O
;	O
the	O
launch	O
featured	O
two	O
Snapdragon	B-Architecture
835-powered	O
2-in-1	O
laptops	O
from	O
Asus	O
and	O
HP	O
,	O
and	O
an	O
integration	O
of	O
Qualcomm	O
's	O
Snapdragon	B-Application
X16	I-Application
gigabit	O
LTE	O
modem	O
with	O
AMD	O
's	O
Ryzen	O
Mobile	B-Operating_System
platform	I-Operating_System
.	O
</s>
<s>
On	O
May	O
2	O
,	O
2017	O
,	O
Microsoft	O
unveiled	O
Windows	B-Operating_System
10	I-Operating_System
S	O
,	O
an	O
edition	O
of	O
Windows	B-Operating_System
10	I-Operating_System
designed	O
primarily	O
for	O
low-end	O
mobile	O
devices	O
targeting	O
the	O
education	O
market	O
(	O
competing	O
primarily	O
with	O
Google	B-Application
's	I-Application
Linux-based	O
ChromeOS	B-Operating_System
)	O
.	O
</s>
<s>
Similarly	O
to	O
Windows	B-Operating_System
RT	I-Operating_System
,	O
it	O
restricted	O
software	O
installation	O
to	O
applications	O
obtained	O
via	O
Windows	B-Application
Store	I-Application
.	O
</s>
<s>
Windows	B-Operating_System
10	I-Operating_System
S	O
was	O
replaced	O
by	O
S	O
Mode	O
,	O
a	O
mode	O
in	O
which	O
manufacturers	O
can	O
ship	O
Windows	B-Operating_System
10	I-Operating_System
computers	O
with	O
the	O
same	O
restrictions	O
,	O
but	O
they	O
can	O
be	O
turned	O
off	O
by	O
the	O
user	O
.	O
</s>
