<s>
Windows	B-Device
8.1	I-Device
is	O
a	O
release	O
of	O
the	O
Windows	B-Device
NT	I-Device
operating	B-General_Concept
system	I-General_Concept
developed	O
by	O
Microsoft	O
.	O
</s>
<s>
It	O
was	O
released	O
to	O
manufacturing	O
on	O
August	O
27	O
,	O
2013	O
,	O
and	O
broadly	O
released	O
for	O
retail	O
sale	O
on	O
October	O
17	O
,	O
2013	O
,	O
about	O
a	O
year	O
after	O
the	O
retail	O
release	O
of	O
its	O
predecessor	O
,	O
and	O
succeeded	O
by	O
Windows	B-Operating_System
10	I-Operating_System
on	O
July	O
29	O
,	O
2015	O
.	O
</s>
<s>
Windows	B-Device
8.1	I-Device
was	O
made	O
available	O
for	O
download	O
via	O
MSDN	O
and	O
Technet	O
and	O
available	O
as	O
a	O
free	O
upgrade	O
for	O
retail	O
copies	O
of	O
Windows	B-Application
8	I-Application
and	O
Windows	B-Operating_System
RT	I-Operating_System
users	O
via	O
the	O
Windows	B-Application
Store	I-Application
.	O
</s>
<s>
A	O
server	B-Device
version	O
,	O
Windows	B-Device
Server	I-Device
2012	O
R2	O
,	O
was	O
released	O
on	O
October	O
18	O
,	O
2013	O
.	O
</s>
<s>
Windows	B-Device
8.1	I-Device
aimed	O
to	O
address	O
complaints	O
of	O
Windows	B-Application
8	I-Application
users	O
and	O
reviewers	O
on	O
launch	O
.	O
</s>
<s>
Enhancements	O
include	O
an	O
improved	O
Start	O
screen	O
,	O
additional	O
snap	O
views	O
,	O
additional	O
bundled	O
apps	O
,	O
tighter	O
OneDrive	B-Application
(	O
formerly	O
SkyDrive	B-Application
)	O
integration	O
,	O
Internet	B-Application
Explorer	I-Application
11	I-Application
(	O
IE11	B-Application
)	O
,	O
a	O
Bing-powered	O
unified	O
search	O
system	O
,	O
restoration	O
of	O
a	O
visible	O
Start	O
button	O
on	O
the	O
taskbar	O
,	O
and	O
the	O
ability	O
to	O
restore	O
the	O
previous	O
behavior	O
of	O
opening	O
the	O
user	O
's	O
desktop	O
on	O
login	B-General_Concept
instead	O
of	O
the	O
Start	O
screen	O
.	O
</s>
<s>
Windows	B-Device
8.1	I-Device
also	O
added	O
support	O
for	O
then	O
emerging	O
technologies	O
like	O
high-resolution	O
displays	O
,	O
3D	O
printing	O
,	O
Wi-Fi	O
Direct	O
,	O
and	O
Miracast	O
streaming	O
,	O
as	O
well	O
as	O
the	O
ReFS	B-Application
file	O
system	O
.	O
</s>
<s>
Windows	B-Device
8.1	I-Device
received	O
more	O
positive	O
reception	O
than	O
Windows	B-Application
8	I-Application
,	O
with	O
critics	O
praising	O
the	O
expanded	O
functionality	O
available	O
to	O
apps	O
in	O
comparison	O
to	O
Windows	B-Application
8	I-Application
,	O
its	O
OneDrive	B-Application
integration	O
,	O
its	O
user	O
interface	O
tweaks	O
,	O
and	O
the	O
addition	O
of	O
expanded	O
tutorials	O
for	O
operating	O
the	O
Windows	B-Application
8	I-Application
interface	O
.	O
</s>
<s>
Despite	O
these	O
improvements	O
,	O
Windows	B-Device
8.1	I-Device
was	O
still	O
criticized	O
for	O
not	O
addressing	O
all	O
issues	O
of	O
Windows	B-Application
8	I-Application
(	O
such	O
as	O
poor	O
integration	O
between	O
Metro-style	O
apps	O
and	O
the	O
desktop	O
interface	O
)	O
,	O
and	O
the	O
potential	O
privacy	O
implications	O
of	O
the	O
expanded	O
use	O
of	O
online	O
services	O
.	O
</s>
<s>
Mainstream	O
support	O
for	O
Windows	B-Device
8.1	I-Device
ended	O
on	O
January	O
9	O
,	O
2018	O
,	O
and	O
extended	O
support	O
ended	O
on	O
January	O
10	O
,	O
2023	O
.	O
</s>
<s>
Mainstream	O
support	O
for	O
the	O
Embedded	O
Industry	O
edition	O
of	O
Windows	B-Device
8.1	I-Device
ended	O
on	O
July	O
10	O
,	O
2018	O
and	O
extended	O
support	O
will	O
end	O
on	O
July	O
11	O
,	O
2023	O
.	O
</s>
<s>
,	O
0.84	O
%	O
of	O
traditional	O
PCs	O
running	O
Windows	O
are	O
running	O
Windows	B-Device
8.1	I-Device
,	O
making	O
it	O
the	O
4th	O
most	O
popular	O
Windows	O
version	O
used	O
since	O
Windows	B-Application
11	I-Application
surpassed	O
it	O
.	O
</s>
<s>
In	O
February	O
2013	O
,	O
ZDNet	O
writer	O
Mary	O
Jo	O
Foley	O
disclosed	O
potential	O
rumors	O
about	O
"	O
Blue	O
"	O
,	O
the	O
codename	O
for	O
a	O
wave	O
of	O
planned	O
updates	O
across	O
several	O
Microsoft	O
products	O
and	O
services	O
,	O
including	O
Windows	B-Application
8	I-Application
,	O
Windows	O
Phone	O
8	O
,	O
Outlook.com,	O
and	O
SkyDrive	B-Application
.	O
</s>
<s>
Lending	O
credibility	O
to	O
the	O
reports	O
,	O
Foley	O
noted	O
that	O
a	O
Microsoft	O
staff	O
member	O
had	O
listed	O
experience	O
with	O
"	O
Windows	O
Blue	O
"	O
on	O
his	O
LinkedIn	B-Application
profile	O
,	O
and	O
listed	O
it	O
as	O
a	O
separate	O
operating	B-General_Concept
system	I-General_Concept
from	O
8	O
.	O
</s>
<s>
A	O
post-RTM	O
build	O
of	O
Windows	B-Application
8	I-Application
,	O
build	O
9364	O
,	O
was	O
leaked	O
in	O
March	O
2013	O
.	O
</s>
<s>
The	O
build	O
,	O
which	O
was	O
believed	O
to	O
be	O
of	O
"	O
Windows	O
Blue	O
"	O
,	O
revealed	O
a	O
number	O
of	O
enhancements	O
across	O
Windows	B-Application
8	I-Application
's	O
interface	O
,	O
including	O
additional	O
size	O
options	O
for	O
tiles	O
,	O
expanded	O
color	O
options	O
on	O
the	O
Start	O
screen	O
,	O
the	O
expansion	O
of	O
PC	O
Settings	O
to	O
include	O
more	O
options	O
that	O
were	O
previously	O
exclusive	O
to	O
the	O
desktop	O
Control	O
Panel	O
,	O
the	O
ability	O
for	O
apps	O
to	O
snap	O
to	O
half	O
of	O
the	O
screen	O
,	O
the	O
ability	O
to	O
take	O
screenshots	O
from	O
the	O
Share	O
charm	O
,	O
additional	O
stock	O
apps	O
,	O
increased	O
SkyDrive	B-Application
integration	O
(	O
such	O
as	O
automatic	O
device	O
backups	B-Application
)	O
and	O
Internet	B-Application
Explorer	I-Application
11	I-Application
.	O
</s>
<s>
In	O
early	O
May	O
,	O
press	O
reports	O
announcing	O
the	O
upcoming	O
version	O
in	O
Financial	O
Times	O
and	O
The	O
Economist	O
negatively	O
compared	O
Windows	B-Application
8	I-Application
to	O
New	O
Coke	O
.	O
</s>
<s>
On	O
May	O
14	O
,	O
2013	O
,	O
Microsoft	O
announced	O
that	O
"	O
Blue	O
"	O
was	O
officially	O
unveiled	O
as	O
Windows	B-Device
8.1	I-Device
.	O
</s>
<s>
Following	O
a	O
keynote	O
presentation	O
focusing	O
on	O
this	O
version	O
,	O
the	O
public	O
beta	O
of	O
Windows	B-Device
8.1	I-Device
was	O
released	O
on	O
June	O
26	O
,	O
2013	O
,	O
during	O
Build	O
.	O
</s>
<s>
Build	O
9600	O
of	O
Windows	B-Device
8.1	I-Device
was	O
released	O
to	O
OEM	O
hardware	O
partners	O
on	O
August	O
27	O
,	O
2013	O
,	O
and	O
became	O
generally	O
available	O
on	O
October	O
17	O
,	O
2013	O
.	O
</s>
<s>
Unlike	O
past	O
releases	O
of	O
Windows	O
and	O
its	O
service	O
packs	O
,	O
volume	B-License
license	I-License
customers	O
and	O
subscribers	O
to	O
MSDN	O
Plus	O
and	O
TechNet	O
Plus	O
were	O
unable	O
to	O
obtain	O
the	O
RTM	O
version	O
upon	O
its	O
release	O
;	O
a	O
spokesperson	O
stated	O
that	O
the	O
change	O
in	O
policy	O
was	O
to	O
allow	O
Microsoft	O
to	O
work	O
with	O
OEMs	O
"	O
to	O
ensure	O
a	O
quality	O
experience	O
at	O
general	O
availability.	O
"	O
</s>
<s>
Microsoft	O
stated	O
that	O
Windows	B-Device
8.1	I-Device
would	O
be	O
released	O
to	O
the	O
general	O
public	O
on	O
October	O
17	O
,	O
2013	O
.	O
</s>
<s>
Microsoft	O
announced	O
that	O
Windows	B-Device
8.1	I-Device
,	O
along	O
with	O
Windows	B-Device
Server	I-Device
2012	O
R2	O
,	O
was	O
released	O
to	O
manufacturing	O
on	O
August	O
27	O
,	O
2013	O
.	O
</s>
<s>
Prior	O
to	O
the	O
release	O
of	O
Windows	B-Device
8.1	I-Device
,	O
Microsoft	O
premiered	O
a	O
new	O
television	O
commercial	O
in	O
late-September	O
2013	O
that	O
focused	O
on	O
its	O
changes	O
as	O
part	O
of	O
the	O
"	O
Windows	O
Everywhere	O
"	O
campaign	O
.	O
</s>
<s>
Shortly	O
after	O
its	O
release	O
,	O
Windows	B-Operating_System
RT	I-Operating_System
8.1	B-Device
was	O
temporarily	O
recalled	O
by	O
Microsoft	O
following	O
reports	O
that	O
some	O
users	O
had	O
encountered	O
a	O
rare	O
bug	O
which	O
corrupted	O
the	O
operating	B-General_Concept
system	I-General_Concept
'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
confirmed	O
that	O
the	O
bug	O
was	O
limited	O
to	O
the	O
original	B-Device
Surface	I-Device
tablet	O
,	O
and	O
only	O
affected	O
1	O
in	O
1000	O
installations	O
.	O
</s>
<s>
The	O
company	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
,	O
and	O
restored	O
access	O
to	O
Windows	B-Operating_System
RT	I-Operating_System
8.1	B-Device
the	O
next	O
day	O
.	O
</s>
<s>
It	O
was	O
also	O
found	O
that	O
changes	O
to	O
screen	O
resolution	O
handling	O
on	O
Windows	B-Device
8.1	I-Device
resulted	O
in	O
mouse	B-Device
input	I-Device
lag	O
in	O
certain	O
video	O
games	O
that	O
do	O
not	O
use	O
the	O
DirectInput	O
API's—particularly	O
first-person	O
shooter	O
games	O
,	O
including	O
Deus	B-Application
Ex	I-Application
:	I-Application
Human	I-Application
Revolution	I-Application
,	O
Hitman	B-Application
:	I-Application
Absolution	I-Application
,	O
and	O
Metro	B-Application
2033	I-Application
.	O
</s>
<s>
Microsoft	O
released	O
a	O
patch	O
to	O
fix	O
the	O
bug	O
on	O
certain	O
games	O
in	O
November	O
2013	O
,	O
and	O
acknowledged	O
that	O
it	O
was	O
caused	O
by	O
"	O
changes	O
to	O
mouse-input	O
processing	O
for	O
low-latency	O
interaction	O
scenarios	O
"	O
.	O
</s>
<s>
On	O
April	O
8	O
,	O
2014	O
,	O
Microsoft	O
released	O
the	O
Windows	B-Device
8.1	I-Device
Update	O
,	O
which	O
included	O
all	O
past	O
updates	O
plus	O
new	O
features	O
.	O
</s>
<s>
Unlike	O
Windows	B-Device
8.1	I-Device
itself	O
,	O
this	O
cumulative	O
update	O
is	O
distributed	O
through	O
Windows	O
Update	O
,	O
and	O
must	O
be	O
installed	O
in	O
order	O
to	O
receive	O
any	O
further	O
patches	O
for	O
Windows	B-Device
8.1	I-Device
.	O
</s>
<s>
At	O
the	O
2014	O
Build	O
conference	O
,	O
during	O
April	O
,	O
Microsoft	O
's	O
Terry	O
Myerson	O
unveiled	O
further	O
user	O
interface	O
changes	O
for	O
Windows	B-Device
8.1	I-Device
,	O
including	O
the	O
ability	O
to	O
run	O
Metro-style	O
apps	O
inside	O
desktop	O
windows	O
,	O
and	O
a	O
revised	O
Start	O
menu	O
,	O
which	O
creates	O
a	O
compromise	O
between	O
the	O
Start	O
menu	O
design	O
used	O
by	O
Windows	B-Device
7	I-Device
and	O
the	O
Start	O
screen	O
,	O
by	O
combining	O
the	O
application	O
listing	O
in	O
the	O
first	O
column	O
with	O
a	O
second	O
that	O
can	O
be	O
used	O
to	O
display	O
app	O
tiles	O
,	O
whereas	O
Windows	B-Application
8.0	I-Application
used	O
a	O
screen	B-General_Concept
hotspot	I-General_Concept
(	O
"	O
hot	O
corner	O
"	O
)	O
.	O
</s>
<s>
Microsoft	O
also	O
unveiled	O
a	O
concept	O
known	O
as	O
"	O
Universal	O
Windows	B-Application
apps	I-Application
"	O
,	O
in	O
which	O
a	O
Windows	O
Runtime	O
app	O
can	O
be	O
ported	O
to	O
Windows	B-Protocol
Phone	I-Protocol
8.1	I-Protocol
and	O
Xbox	B-Device
One	I-Device
while	O
sharing	O
a	O
common	O
codebase	O
.	O
</s>
<s>
While	O
it	O
does	O
not	O
entirely	O
unify	O
Windows	O
 '	O
app	O
ecosystem	B-Application
with	O
that	O
of	O
Windows	O
Phone	O
,	O
it	O
will	O
allow	O
developers	O
to	O
synchronize	O
data	O
between	O
versions	O
of	O
their	O
app	O
on	O
each	O
platform	O
,	O
and	O
bundle	O
access	O
to	O
Windows	O
,	O
Windows	O
Phone	O
,	O
and	O
Xbox	B-Device
One	I-Device
versions	O
of	O
an	O
app	O
in	O
a	O
single	O
purchase	O
.	O
</s>
<s>
However	O
,	O
meeting	O
this	O
deadline	O
proved	O
challenging	O
:	O
The	O
ability	O
to	O
deploy	O
Windows	B-Device
8.1	I-Device
Update	O
through	O
Windows	B-Device
Server	I-Device
Update	O
Services	O
(	O
WSUS	O
)	O
was	O
disabled	O
shortly	O
after	O
its	O
release	O
following	O
the	O
discovery	O
of	O
a	O
bug	O
which	O
affects	O
the	O
ability	O
to	O
use	O
WSUS	O
as	O
a	O
whole	O
in	O
certain	O
server	B-Device
configurations	O
.	O
</s>
<s>
Microsoft	O
markets	O
Windows	B-Device
8.1	I-Device
as	O
an	O
"	O
update	O
"	O
for	O
Windows	B-Application
8	I-Application
,	O
avoiding	O
the	O
term	O
"	O
upgrade.	O
"	O
</s>
<s>
Microsoft	O
's	O
support	O
lifecycle	O
policy	O
treats	O
Windows	B-Device
8.1	I-Device
similar	O
to	O
previous	O
service	O
packs	O
of	O
Windows	O
:	O
It	O
is	O
part	O
of	O
Windows	B-Application
8	I-Application
's	O
support	O
lifecycle	O
,	O
and	O
upgrading	O
to	O
Windows	B-Device
8.1	I-Device
is	O
required	O
to	O
maintain	O
access	O
to	O
support	O
and	O
Windows	O
updates	O
after	O
January	O
12	O
,	O
2016	O
.	O
</s>
<s>
Retail	O
and	O
OEM	O
copies	O
of	O
Windows	B-Application
8	I-Application
,	O
Windows	B-Application
8	I-Application
Pro	O
,	O
and	O
Windows	B-Operating_System
RT	I-Operating_System
can	O
be	O
upgraded	O
through	O
Windows	B-Application
Store	I-Application
free	O
of	O
charge	O
.	O
</s>
<s>
However	O
,	O
volume	B-License
license	I-License
customers	O
,	O
TechNet	O
or	O
MSDN	O
subscribers	O
and	O
users	O
of	O
Windows	B-Application
8	I-Application
Enterprise	O
must	O
acquire	O
standalone	O
installation	O
media	O
for	O
Windows	B-Device
8.1	I-Device
and	O
install	O
through	O
the	O
traditional	O
Windows	O
setup	O
process	O
,	O
either	O
as	O
an	O
in-place	O
upgrade	O
or	O
clean	O
install	O
.	O
</s>
<s>
Upgrading	O
through	O
Windows	B-Application
Store	I-Application
requires	O
each	O
machine	O
to	O
download	O
an	O
upgrade	O
package	O
as	O
big	O
as	O
2	O
–	O
3.6	O
GB	O
.	O
</s>
<s>
On	O
July	O
1	O
,	O
2014	O
,	O
acknowledging	O
difficulties	O
users	O
may	O
have	O
had	O
through	O
the	O
Windows	B-Application
Store	I-Application
update	O
method	O
,	O
Microsoft	O
began	O
to	O
phase	O
in	O
an	O
automatic	O
download	O
process	O
for	O
Windows	B-Device
8.1	I-Device
.	O
</s>
<s>
Windows	B-Application
8	I-Application
was	O
re-issued	O
at	O
retail	O
as	O
Windows	B-Device
8.1	I-Device
alongside	O
the	O
online	O
upgrade	O
for	O
those	O
who	O
did	O
not	O
currently	O
own	O
a	O
Windows	B-Application
8	I-Application
license	O
.	O
</s>
<s>
Retail	O
copies	O
of	O
Windows	B-Device
8.1	I-Device
contain	O
"	O
Full	O
"	O
licenses	O
that	O
can	O
be	O
installed	O
on	O
any	O
computer	O
,	O
regardless	O
of	O
their	O
existing	O
operating	B-General_Concept
system	I-General_Concept
,	O
unlike	O
Windows	B-Application
8	I-Application
retail	O
copies	O
,	O
which	O
were	O
only	O
available	O
at	O
retail	O
with	O
upgrade	O
licenses	O
.	O
</s>
<s>
Pricing	O
for	O
the	O
retail	O
copies	O
of	O
Windows	B-Device
8.1	I-Device
remained	O
the	O
same	O
.	O
</s>
<s>
Windows	B-Device
8.1	I-Device
with	O
Bing	B-Application
is	O
a	O
reduced-cost	O
SKU	O
of	O
Windows	B-Device
8.1	I-Device
that	O
was	O
introduced	O
by	O
Microsoft	O
in	O
May	O
2014	O
in	O
an	O
effort	O
to	O
further	O
encourage	O
the	O
production	O
of	O
low-cost	O
Windows	O
devices	O
,	O
whilst	O
"	O
driving	O
end-user	O
usage	O
of	O
Microsoft	O
Services	O
such	O
as	O
Bing	B-Application
and	O
OneDrive	B-Application
"	O
.	O
</s>
<s>
It	O
is	O
subsidized	O
by	O
Microsoft	O
's	O
Bing	B-Application
search	I-Application
engine	I-Application
,	O
which	O
is	O
set	O
as	O
the	O
default	O
within	O
Internet	B-Application
Explorer	I-Application
and	O
cannot	O
be	O
changed	O
by	O
OEMs	O
.	O
</s>
<s>
It	O
is	O
otherwise	O
and	O
functionally	O
identical	O
to	O
the	O
base	O
edition	O
of	O
Windows	B-Device
8.1	I-Device
.	O
</s>
<s>
Many	O
of	O
the	O
changes	O
on	O
Windows	B-Device
8.1	I-Device
,	O
particularly	O
to	O
the	O
user	O
interface	O
,	O
were	O
made	O
in	O
response	O
to	O
criticisms	O
from	O
early	O
adopters	O
and	O
other	O
critics	O
after	O
the	O
release	O
of	O
Windows	B-Application
8	I-Application
.	O
</s>
<s>
The	O
Start	O
screen	O
received	O
several	O
enhancements	O
on	O
Windows	B-Device
8.1	I-Device
,	O
including	O
an	O
extended	O
"	O
All	O
Apps	O
"	O
view	O
with	O
sort	O
modes	O
(	O
accessed	O
by	O
clicking	O
a	O
new	O
down	O
arrow	O
button	O
or	O
swiping	O
upward	O
)	O
,	O
small	O
and	O
extra-large	O
sizes	O
for	O
tiles	O
,	O
and	O
colored	O
tiles	O
for	O
desktop	O
program	O
shortcuts	O
.	O
</s>
<s>
Apps	O
can	O
also	O
launch	O
other	O
apps	O
in	O
a	O
snapped	O
view	O
to	O
display	O
content	O
;	O
for	O
example	O
,	O
the	O
Mail	O
app	O
can	O
open	O
a	O
photo	O
attachment	O
in	O
a	O
picture	B-Application
viewer	I-Application
snapped	O
to	O
another	O
half	O
of	O
the	O
screen	O
.	O
</s>
<s>
The	O
on-screen	O
keyboard	B-Device
has	O
an	O
improved	O
autocomplete	O
mechanism	O
which	O
displays	O
multiple	O
word	O
suggestions	O
,	O
and	O
allows	O
users	O
to	O
select	O
from	O
them	O
by	O
sliding	O
on	O
the	O
spacebar	O
.	O
</s>
<s>
The	O
autocomplete	O
dictionary	O
is	O
also	O
automatically	O
updated	O
using	O
data	O
from	O
Bing	B-Application
,	O
allowing	O
it	O
to	O
recognize	O
and	O
suggest	O
words	O
relating	O
to	O
current	O
trends	O
and	O
events	O
.	O
</s>
<s>
Users	O
can	O
also	O
modify	O
certain	O
user	O
interface	O
behaviors	O
,	O
such	O
as	O
disabling	O
the	O
upper	O
hot	B-General_Concept
corners	I-General_Concept
for	O
using	O
the	O
charms	O
and	O
recent	O
apps	O
list	O
,	O
going	O
to	O
the	O
desktop	O
instead	O
of	O
the	O
Start	O
screen	O
on	O
login	B-General_Concept
or	O
after	O
closing	O
all	O
apps	O
on	O
a	O
screen	O
,	O
automatically	O
opening	O
the	O
"	O
All	O
Apps	O
"	O
view	O
on	O
the	O
Start	O
screen	O
when	O
opened	O
,	O
and	O
prioritizing	O
desktop	O
programs	O
on	O
the	O
"	O
Category	O
"	O
sort	O
mode	O
on	O
"	O
All	O
Apps	O
"	O
.	O
</s>
<s>
To	O
assist	O
users	O
in	O
learning	O
the	O
Windows	B-Application
8	I-Application
user	O
interface	O
,	O
an	O
interactive	O
tutorial	O
was	O
also	O
offered	O
,	O
along	O
with	O
a	O
new	O
Help	O
+	O
Tips	O
app	O
for	O
additional	O
information	O
.	O
</s>
<s>
In	O
contrast	O
,	O
Windows	B-Operating_System
RT	I-Operating_System
8.1	B-Device
downplays	O
the	O
desktop	O
interface	O
further	O
by	O
not	O
displaying	O
the	O
Desktop	O
tile	O
on	O
its	O
default	O
Start	O
screen	O
at	O
all	O
(	O
however	O
,	O
it	O
can	O
still	O
be	O
manually	O
added	O
to	O
the	O
Start	O
screen	O
)	O
.	O
</s>
<s>
Windows	O
manager	O
Chaitanya	O
Sareen	O
stated	O
that	O
the	O
restoration	O
of	O
the	O
visible	O
Start	O
button	O
was	O
intended	O
to	O
be	O
a	O
"	O
warm	O
blanket	O
"	O
for	O
users	O
who	O
had	O
become	O
confused	O
by	O
the	O
removal	O
of	O
the	O
button	O
on	O
8	O
;	O
the	O
Start	O
button	O
was	O
originally	O
removed	O
to	O
reflect	O
Windows	B-Application
8	I-Application
's	O
treatment	O
of	O
the	O
desktop	O
as	O
an	O
"	O
app	O
"	O
rather	O
than	O
the	O
main	O
interface	O
.	O
</s>
<s>
Further	O
interface	O
behavior	O
changes	O
are	O
made	O
on	O
the	O
April	O
2014	O
"	O
Windows	B-Device
8.1	I-Device
Update	O
"	O
,	O
which	O
are	O
oriented	O
towards	O
non-touch	O
environments	O
(	O
such	O
as	O
desktop	O
and	O
laptop	O
PCs	O
)	O
that	O
use	O
a	O
keyboard	B-Device
and	O
mouse	B-Device
,	O
and	O
improve	O
integration	O
between	O
Windows	B-Application
Store	I-Application
apps	O
and	O
the	O
desktop	O
.	O
</s>
<s>
When	O
a	O
mouse	B-Device
is	O
in	O
use	O
,	O
the	O
Desktop	O
is	O
shown	O
on	O
startup	O
by	O
default	O
,	O
the	O
Start	O
screen	O
uses	O
context	O
menus	O
instead	O
of	O
a	O
toolbar	O
across	O
the	O
bottom	O
of	O
the	O
screen	O
for	O
manipulating	O
tiles	O
,	O
an	O
autohiding	O
title	O
bar	O
with	O
minimize	O
and	O
close	O
buttons	O
is	O
displayed	O
within	O
apps	O
at	O
the	O
top	O
of	O
the	O
screen	O
,	O
the	O
taskbar	O
can	O
display	O
and	O
pin	O
apps	O
alongside	O
desktop	O
programs	O
and	O
be	O
accessed	O
from	O
within	O
apps	O
,	O
and	O
visible	O
search	O
and	O
power	O
buttons	O
are	O
added	O
to	O
the	O
Start	O
screen	O
.	O
</s>
<s>
In	O
non-touch	O
environments	O
,	O
the	O
default	O
image	B-Application
viewer	I-Application
and	O
media	B-Device
player	I-Device
programs	O
were	O
changed	O
back	O
to	O
Windows	O
Photo	O
Viewer	O
and	O
Windows	B-Device
Media	I-Device
Player	I-Device
in	O
lieu	O
of	O
the	O
Xbox	B-Application
Video	I-Application
and	O
Photos	O
apps	O
.	O
</s>
<s>
The	O
suite	O
of	O
pre-loaded	O
apps	O
bundled	O
with	O
Windows	B-Application
8	I-Application
were	O
changed	O
in	O
Windows	B-Device
8.1	I-Device
;	O
PC	O
Settings	O
was	O
expanded	O
to	O
include	O
options	O
that	O
were	O
previously	O
exclusive	O
to	O
the	O
desktop	O
Control	O
Panel	O
,	O
Windows	B-Application
Store	I-Application
was	O
updated	O
with	O
an	O
improved	O
interface	O
for	O
browsing	O
apps	O
and	O
automatic	O
updates	O
,	O
the	O
Mail	O
app	O
includes	O
an	O
updated	O
interface	O
and	O
additional	O
features	O
,	O
the	O
Camera	O
app	O
integrates	O
Photosynth	B-Application
for	O
creating	O
panoramas	O
,	O
and	O
additional	O
editing	O
tools	O
were	O
added	O
to	O
the	O
Photos	O
app	O
(	O
while	O
integration	O
with	O
Flickr	B-Algorithm
and	O
Facebook	B-Application
was	O
completely	O
removed	O
)	O
.	O
</s>
<s>
A	O
number	O
of	O
additional	O
stock	O
apps	O
were	O
also	O
added	O
,	O
including	O
Calculator	B-Application
,	O
Food	O
and	O
Drink	O
,	O
Health	O
and	O
Fitness	O
,	O
Sound	B-Application
Recorder	I-Application
,	O
Reading	O
List	O
(	O
which	O
can	O
be	O
used	O
to	O
collect	O
and	O
sync	O
content	O
from	O
apps	O
through	O
OneDrive	B-Application
)	O
,	O
Scan	O
,	O
and	O
Help	O
+	O
Tips	O
.	O
</s>
<s>
For	O
Windows	B-Operating_System
RT	I-Operating_System
users	O
,	O
Windows	B-Device
8.1	I-Device
also	O
adds	O
a	O
version	O
of	O
Microsoft	B-Application
Outlook	I-Application
to	O
the	O
included	O
Office	B-Operating_System
2013	I-Operating_System
RT	I-Operating_System
suite	O
.	O
</s>
<s>
However	O
,	O
it	O
does	O
not	O
support	O
data	O
loss	O
protection	O
,	O
Group	O
Policy	O
,	O
Lync	B-Protocol
integration	O
,	O
or	O
creating	O
emails	O
with	O
information	O
rights	O
management	O
.	O
</s>
<s>
Windows	B-Application
Store	I-Application
is	O
enabled	O
by	O
default	O
within	O
Windows	O
To	O
Go	O
environments	O
.	O
</s>
<s>
On	O
January	O
31	O
,	O
2020	O
,	O
Microsoft	O
released	O
the	O
new	O
Microsoft	B-Application
Edge	I-Application
web	O
browser	O
for	O
Windows	B-Device
8.1	I-Device
.	O
</s>
<s>
Windows	B-Device
8.1	I-Device
adds	O
tighter	O
integration	O
with	O
several	O
Microsoft-owned	O
services	O
.	O
</s>
<s>
OneDrive	B-Application
(	O
formerly	O
SkyDrive	B-Application
)	O
is	O
integrated	O
at	O
the	O
system	O
level	O
to	O
sync	O
user	O
settings	O
and	O
files	O
.	O
</s>
<s>
Files	O
are	O
automatically	O
downloaded	O
in	O
the	O
background	O
when	O
they	O
are	O
accessed	O
from	O
the	O
user	O
's	O
OneDrive	B-Application
folder	O
,	O
unless	O
they	O
are	O
marked	O
to	O
be	O
available	O
offline	O
.	O
</s>
<s>
By	O
default	O
,	O
only	O
file	O
metadata	O
and	O
thumbnails	O
are	O
stored	O
locally	O
,	O
and	O
reparse	B-Application
points	I-Application
are	O
used	O
to	O
give	O
the	O
appearance	O
of	O
a	O
normal	O
directory	O
structure	O
to	O
provide	O
backwards	O
compatibility	O
.	O
</s>
<s>
The	O
OneDrive	B-Application
app	O
was	O
updated	O
to	O
include	O
a	O
local	O
file	B-Application
manager	I-Application
.	O
</s>
<s>
OneDrive	B-Application
use	O
on	O
Windows	B-Device
8.1	I-Device
requires	O
that	O
a	O
user	O
's	O
Windows	O
account	O
be	O
linked	O
to	O
a	O
Microsoft	O
account	O
;	O
the	O
previous	O
SkyDrive	B-Application
desktop	O
client	O
(	O
which	O
did	O
not	O
have	O
this	O
requirement	O
)	O
is	O
not	O
supported	O
on	O
Windows	B-Device
8.1	I-Device
.	O
</s>
<s>
A	O
Bing-based	O
unified	O
search	O
system	O
was	O
added	O
;	O
it	O
can	O
analyze	O
a	O
user	O
's	O
search	O
habits	O
to	O
return	O
results	O
featuring	O
relevant	O
local	O
and	O
online	O
content	O
.	O
</s>
<s>
Full-screen	O
"	O
hero	O
"	O
displays	O
aggregate	O
news	O
articles	O
,	O
Wikipedia	O
entries	O
,	O
multimedia	O
,	O
and	O
other	O
content	O
related	O
to	O
a	O
search	O
query	O
;	O
for	O
instance	O
,	O
searching	O
for	O
a	O
music	O
performer	O
would	O
return	O
photos	O
of	O
the	O
performer	O
,	O
a	O
biography	O
,	O
and	O
their	O
available	O
songs	O
and	O
albums	O
on	O
Xbox	B-Application
Music	I-Application
.	O
</s>
<s>
The	O
messaging	B-Protocol
app	O
from	O
Windows	B-Application
8	I-Application
has	O
been	O
replaced	O
by	O
Skype	B-Application
,	O
which	O
also	O
allows	O
users	O
to	O
accept	O
calls	O
directly	O
from	O
the	O
lock	O
screen	O
.	O
</s>
<s>
Windows	B-Device
8.1	I-Device
also	O
includes	O
Internet	B-Application
Explorer	I-Application
11	I-Application
,	O
which	O
adds	O
support	O
for	O
SPDY	B-Protocol
and	O
WebGL	B-Library
,	O
and	O
expanded	O
developer	O
tools	O
.	O
</s>
<s>
The	O
Metro-style	O
variant	O
of	O
IE11	B-Application
also	O
adds	O
tab	O
syncing	O
,	O
the	O
ability	O
to	O
open	O
an	O
unlimited	O
number	O
of	O
tabs	O
,	O
and	O
Reading	O
List	O
integration	O
.	O
</s>
<s>
Due	O
to	O
Facebook	B-Application
Connect	O
service	O
changes	O
,	O
Facebook	B-Application
support	O
is	O
disabled	O
in	O
all	O
bundled	O
apps	O
effective	O
June	O
8	O
,	O
2015	O
.	O
</s>
<s>
On	O
compatible	O
hardware	O
,	O
Windows	B-Device
8.1	I-Device
also	O
features	O
a	O
transparent	O
"	O
device	O
encryption	O
"	O
system	O
based	O
on	O
BitLocker	O
.	O
</s>
<s>
Encryption	O
begins	O
as	O
soon	O
as	O
a	O
user	O
begins	O
using	O
the	O
system	O
;	O
the	O
recovery	O
key	O
is	O
stored	O
to	O
either	O
the	O
user	O
's	O
Microsoft	O
account	O
or	O
an	O
Active	B-Protocol
Directory	I-Protocol
login	B-General_Concept
,	O
allowing	O
it	O
to	O
be	O
retrieved	O
from	O
any	O
computer	O
.	O
</s>
<s>
While	O
device	O
encryption	O
is	O
offered	O
on	O
all	O
editions	O
of	O
Windows	B-Device
8.1	I-Device
unlike	O
BitLocker	O
(	O
which	O
is	O
exclusive	O
to	O
the	O
Pro	O
and	O
Enterprise	O
editions	O
)	O
,	O
device	O
encryption	O
requires	O
that	O
the	O
device	O
meet	O
the	O
Connected	B-Device
Standby	I-Device
specification	O
and	O
have	O
a	O
Trusted	O
Platform	O
Module	O
(	O
TPM	O
)	O
2.0	O
chip	O
.	O
</s>
<s>
Windows	B-Device
8.1	I-Device
also	O
introduces	O
improved	O
fingerprint	O
recognition	O
APIs	O
,	O
which	O
allows	O
user	O
login	B-General_Concept
,	O
User	O
Account	O
Control	O
,	O
Windows	B-Application
Store	I-Application
and	O
Windows	B-Application
Store	I-Application
apps	O
to	O
use	O
enrolled	O
fingerprints	O
as	O
an	O
authentication	O
method	O
.	O
</s>
<s>
A	O
new	O
kiosk	B-Application
mode	I-Application
known	O
as	O
"	O
Assigned	O
Access	O
"	O
was	O
also	O
added	O
,	O
allowing	O
a	O
device	O
to	O
be	O
configured	O
to	O
use	O
a	O
single	O
app	O
in	O
a	O
restricted	O
environment	O
.	O
</s>
<s>
Additionally	O
,	O
Windows	B-Application
Defender	I-Application
includes	O
an	O
intrusion	O
detection	O
system	O
which	O
can	O
scan	O
network	O
activity	O
for	O
signs	O
of	O
malware	O
.	O
</s>
<s>
Windows	B-Device
8.1	I-Device
also	O
allows	O
third-party	O
VPN	B-Application
clients	I-Application
to	O
automatically	O
trigger	O
connections	O
.	O
</s>
<s>
For	O
enterprise	O
device	O
management	O
,	O
Windows	B-Device
8.1	I-Device
adds	O
support	O
for	O
the	O
Workplace	O
Join	O
feature	O
of	O
Windows	B-Device
Server	I-Device
2012	O
R2	O
,	O
which	O
allows	O
users	O
to	O
enroll	O
their	O
own	O
device	O
into	O
corporate	O
networks	O
with	O
finer	O
control	O
over	O
access	O
to	O
resources	O
and	O
security	O
requirements	O
.	O
</s>
<s>
Windows	B-Device
8.1	I-Device
also	O
supports	O
the	O
OMA	O
Device	O
Management	O
specifications	O
.	O
</s>
<s>
Remote	O
Data	O
Control	O
can	O
be	O
used	O
to	O
remotely	O
wipe	O
specific	O
"	O
corporate	O
"	O
data	O
from	O
Windows	B-Device
8.1	I-Device
devices	O
.	O
</s>
<s>
The	O
64-bit	O
variants	O
of	O
Windows	B-Device
8.1	I-Device
no	O
longer	O
support	O
processors	O
which	O
do	O
not	O
implement	O
the	O
double-width	O
compare	O
and	O
exchange	O
(	O
CMPXCHG16B	O
)	O
CPU	B-General_Concept
instruction	I-General_Concept
(	O
which	O
the	O
installer	O
reports	O
as	O
a	O
lack	O
of	O
support	O
for	O
"	O
CompareExchange128	O
"	O
)	O
.	O
</s>
<s>
Brad	O
Chacos	O
of	O
PC	O
World	O
also	O
reported	O
a	O
case	O
in	O
which	O
Windows	B-Device
8.1	I-Device
rejected	O
Intel	O
Core	O
2	O
Quad	O
Q9300	O
and	O
a	O
Q9550S	O
despite	O
their	O
support	O
for	O
this	O
instruction	O
,	O
because	O
the	O
associated	O
Intel	O
DP35DP	O
motherboard	B-Device
did	O
not	O
.	O
</s>
<s>
These	O
changes	O
do	O
not	O
affect	O
the	O
32-bit	O
variants	O
of	O
Windows	B-Device
8.1	I-Device
.	O
</s>
<s>
Windows	B-Device
8.1	I-Device
adds	O
support	O
for	O
3D	O
printing	O
,	O
pairing	O
with	O
printers	O
using	O
NFC	O
tags	O
,	O
Wi-Fi	O
Direct	O
,	O
Miracast	O
media	O
streaming	O
,	O
tethering	O
,	O
and	O
NVMe	B-Application
.	O
</s>
<s>
In	O
response	O
to	O
the	O
increasing	O
pixel	B-Algorithm
density	I-Algorithm
in	O
displays	O
,	O
Windows	B-Device
8.1	I-Device
can	O
scale	O
text	O
and	O
GUI	B-Application
elements	O
up	O
to	O
200%	O
(	O
whereas	O
Windows	B-Application
8	I-Application
supported	O
only	O
150%	O
)	O
and	O
set	O
scaling	O
settings	O
independently	O
on	O
each	O
display	O
in	O
multi-monitor	O
configurations	O
.	O
</s>
<s>
Backup	B-Application
and	O
Restore	O
,	O
the	O
backup	B-Application
component	I-Application
of	O
Windows	O
that	O
had	O
been	O
deprecated	B-General_Concept
but	O
was	O
available	O
in	O
Windows	B-Application
8	I-Application
through	O
a	O
Control	O
Panel	O
applet	O
called	O
"	O
Windows	B-Device
7	I-Device
File	O
Recovery	O
"	O
,	O
was	O
removed	O
.	O
</s>
<s>
Windows	B-Device
8.1	I-Device
also	O
removes	O
the	O
graphical	B-Application
user	I-Application
interface	I-Application
for	O
the	O
Windows	O
System	O
Assessment	O
Tool	O
,	O
meaning	O
that	O
the	O
Windows	O
Experience	O
Index	O
is	O
no	O
longer	O
displayed	O
.	O
</s>
<s>
The	O
command	B-Application
line	I-Application
variant	O
of	O
the	O
tool	O
remains	O
available	O
on	O
the	O
system	O
.	O
</s>
<s>
Microsoft	O
reportedly	O
removed	O
the	O
graphical	O
Windows	O
Experience	O
Index	O
in	O
order	O
to	O
promote	O
the	O
idea	O
that	O
all	O
kinds	O
of	O
hardware	O
run	O
Windows	B-Application
8	I-Application
equally	O
well	O
.	O
</s>
<s>
Windows	B-Device
8.1	I-Device
removed	O
the	O
ability	O
of	O
several	O
Universal	O
Windows	O
Platform	O
apps	O
to	O
act	O
as	O
"	O
hubs	O
"	O
connecting	O
similar	O
services	O
within	O
a	O
single	O
interface	O
:	O
</s>
<s>
The	O
Photos	O
app	O
lost	O
the	O
ability	O
to	O
view	O
photos	O
from	O
Facebook	B-Application
,	O
Flickr	B-Algorithm
or	O
SkyDrive	B-Application
(	O
branded	O
as	O
OneDrive	B-Application
since	O
February	O
2014	O
)	O
.	O
</s>
<s>
The	O
Messaging	B-Protocol
app	O
,	O
which	O
was	O
interoperable	O
with	O
Windows	B-Protocol
Live	I-Protocol
Messenger	I-Protocol
and	O
Facebook	B-Application
Chat	O
,	O
was	O
deprecated	B-General_Concept
in	O
favor	O
of	O
a	O
Skype	B-Application
app	O
that	O
is	O
not	O
compatible	O
with	O
Facebook	B-Application
Chat	O
;	O
</s>
<s>
The	O
Calendar	O
app	O
can	O
only	O
connect	O
to	O
Microsoft	O
services	O
such	O
as	O
Outlook.com	B-Operating_System
and	O
Microsoft	B-Operating_System
Exchange	I-Operating_System
,	O
with	O
support	O
for	O
Google	B-Application
Calendar	I-Application
removed	O
.	O
</s>
<s>
Since	O
October	O
2016	O
,	O
all	O
future	O
patches	O
are	O
cumulative	O
as	O
with	O
Windows	B-Operating_System
10	I-Operating_System
;	O
individual	O
patches	O
can	O
no	O
longer	O
be	O
downloaded	O
.	O
</s>
<s>
Windows	B-Device
8.1	I-Device
received	O
more	O
positive	O
reviews	O
than	O
Windows	B-Application
8	I-Application
.	O
</s>
<s>
Tom	O
Warren	O
of	O
The	O
Verge	O
still	O
considered	O
the	O
platform	O
to	O
be	O
a	O
"	O
work	O
in	O
progress	O
"	O
due	O
to	O
the	O
number	O
of	O
apps	O
available	O
,	O
the	O
impaired	O
level	O
of	O
capabilities	O
that	O
apps	O
have	O
in	O
comparison	O
to	O
desktop	O
programs	O
,	O
and	O
because	O
he	O
felt	O
that	O
mouse	B-Device
and	O
keyboard	B-Device
navigation	O
was	O
still	O
"	O
awkward	O
"	O
.	O
</s>
<s>
However	O
,	O
he	O
touted	O
many	O
of	O
the	O
major	O
changes	O
on	O
Windows	B-Device
8.1	I-Device
,	O
such	O
as	O
the	O
expanded	O
snapping	O
functionality	O
,	O
increased	O
Start	O
screen	O
customization	O
,	O
SkyDrive	B-Application
and	O
Bing	B-Application
integration	O
,	O
improvements	O
to	O
stock	O
apps	O
,	O
and	O
particularly	O
he	O
considered	O
the	O
Mail	O
app	O
to	O
be	O
"	O
lightyears	O
ahead	O
"	O
of	O
the	O
original	O
version	O
from	O
8	O
.	O
</s>
<s>
Joel	O
Hruska	O
of	O
ExtremeTech	O
criticized	O
continuing	O
integration	O
problems	O
between	O
the	O
Desktop	O
and	O
apps	O
on	O
Windows	B-Device
8.1	I-Device
,	O
pointing	O
out	O
examples	O
such	O
as	O
the	O
Photos	O
app	O
,	O
which	O
"	O
still	O
refuses	O
to	O
acknowledge	O
that	O
users	O
might	O
have	O
previous	O
photo	O
directories	O
"	O
,	O
and	O
that	O
the	O
Mail	O
app	O
"	O
still	O
ca	O
n’t	O
talk	O
to	O
the	O
desktop	O
—	O
if	O
you	O
try	O
to	O
send	O
an	O
email	O
from	O
the	O
Desktop	O
without	O
another	O
mail	O
client	O
installed	O
,	O
Windows	O
will	O
tell	O
you	O
there	O
’s	O
no	O
mail	O
client	O
capable	O
of	O
performing	O
that	O
action.	O
"	O
</s>
<s>
Windows	B-Device
8.1	I-Device
'	O
s	O
search	O
functionality	O
was	O
met	O
with	O
mixed	O
reviews	O
;	O
while	O
noting	O
the	O
Bing	B-Application
integration	O
and	O
updated	O
design	O
,	O
the	O
system	O
was	O
panned	O
for	O
arbitrarily	O
leaving	O
out	O
secondary	O
storage	O
devices	O
from	O
the	O
"	O
Everything	O
"	O
mode	O
.	O
</s>
<s>
Peter	O
Bright	O
of	O
Ars	O
Technica	O
praised	O
many	O
of	O
the	O
improvements	O
on	O
Windows	B-Device
8.1	I-Device
,	O
such	O
as	O
its	O
more	O
"	O
complete	O
"	O
touch	O
interface	O
,	O
the	O
"	O
reasonable	O
"	O
tutorial	O
content	O
,	O
the	O
new	O
autocomplete	O
tools	O
on	O
the	O
on-screen	O
keyboard	B-Device
,	O
software	O
improvements	O
,	O
and	O
the	O
deep	O
SkyDrive	B-Application
integration	O
.	O
</s>
<s>
Certain	O
aspects	O
of	O
Windows	B-Device
8.1	I-Device
were	O
also	O
cause	O
for	O
concern	O
because	O
of	O
their	O
privacy	O
implications	O
.	O
</s>
<s>
In	O
his	O
review	O
of	O
Windows	B-Device
8.1	I-Device
,	O
Joel	O
Hruska	O
noted	O
that	O
Microsoft	O
had	O
deliberately	O
made	O
it	O
harder	O
for	O
users	O
to	O
create	O
a	O
"	O
Local	O
"	O
account	O
that	O
is	O
not	O
tied	O
to	O
a	O
Microsoft	O
account	O
for	O
syncing	O
,	O
as	O
it	O
"[makes]	O
clear	O
that	O
the	O
company	O
really	O
,	O
really	O
,	O
wants	O
you	O
to	O
share	O
everything	O
you	O
do	O
with	O
it	O
,	O
and	O
that	O
’s	O
not	O
something	O
an	O
increasing	O
number	O
of	O
people	O
and	O
businesses	O
are	O
comfortable	O
doing.	O
"	O
</s>
<s>
Woody	O
Leonhard	O
of	O
InfoWorld	O
noted	O
that	O
by	O
default	O
Windows	B-Device
8.1	I-Device
'	O
s	O
"	O
Smart	O
Search	O
"	O
system	O
sends	O
search	O
queries	O
and	O
other	O
information	O
to	O
Microsoft	O
,	O
which	O
could	O
be	O
used	O
for	O
targeted	O
advertising	O
.	O
</s>
<s>
Leonhard	O
considered	O
this	O
to	O
be	O
ironic	O
,	O
given	O
that	O
Microsoft	O
had	O
criticized	O
Google	B-Application
's	I-Application
use	O
of	O
similar	O
tactics	O
with	O
its	O
"	O
Scroogled	O
"	O
advertising	O
campaign	O
.	O
</s>
<s>
According	O
to	O
Net	O
Applications	O
,	O
the	O
adoption	O
rate	O
in	O
March	O
2015	O
for	O
Windows	B-Device
8.1	I-Device
was	O
at	O
10.55	O
%	O
,	O
three	O
times	O
that	O
of	O
the	O
original	O
Windows	B-Application
8	I-Application
at	O
3.52	O
%	O
.	O
</s>
<s>
Windows	B-Device
8.1	I-Device
reached	O
a	O
peak	O
adoption	O
rate	O
of	O
13.12	O
%	O
in	O
June	O
2015	O
compared	O
with	O
Windows	B-Application
8	I-Application
peak	O
adoption	O
rate	O
of	O
8.02	O
%	O
in	O
September	O
2013	O
.	O
</s>
