<s>
Windows	B-Application
Home	I-Application
Server	I-Application
(	O
code-named	O
Quattro	O
)	O
is	O
a	O
home	B-Application
server	I-Application
operating	B-General_Concept
system	I-General_Concept
from	O
Microsoft	O
.	O
</s>
<s>
Windows	B-Application
Home	I-Application
Server	I-Application
was	O
based	O
on	O
Windows	O
Server	O
2003	O
R2	O
and	O
was	O
intended	O
to	O
be	O
a	O
solution	O
for	O
homes	O
with	O
multiple	O
connected	O
PCs	B-Device
to	O
offer	O
file	O
sharing	O
,	O
automated	O
backups	B-Protocol
,	O
print	B-Application
server	I-Application
,	O
and	O
remote	O
access	O
.	O
</s>
<s>
It	O
is	O
paired	O
with	O
the	O
Windows	B-Application
Home	I-Application
Server	I-Application
Console	O
—	O
client	O
software	O
accessed	O
from	O
another	O
computer	O
on	O
the	O
network	O
to	O
provide	O
a	O
graphical	O
management	O
interface	O
.	O
</s>
<s>
Power	O
Pack	O
1	O
for	O
Windows	B-Application
Home	I-Application
Server	I-Application
was	O
released	O
on	O
20	O
July	O
2008	O
.	O
</s>
<s>
Windows	B-Application
Home	I-Application
Server	I-Application
2011	O
,	O
the	O
next	O
version	O
of	O
this	O
operating	B-General_Concept
system	I-General_Concept
,	O
was	O
released	O
on	O
6	O
April	O
2011	O
.	O
</s>
<s>
Microsoft	O
confirmed	O
Windows	B-Application
Home	I-Application
Server	I-Application
2011	O
to	O
be	O
last	O
release	O
in	O
the	O
Windows	B-Application
Home	I-Application
Server	I-Application
product	O
line	O
.	O
</s>
<s>
Windows	B-Application
Home	I-Application
Server	I-Application
was	O
the	O
brainchild	O
of	O
Charlie	O
Kindel	O
who	O
was	O
the	O
General	O
Manager	O
for	O
the	O
product	O
from	O
2005	O
through	O
2009	O
.	O
</s>
<s>
Microsoft	O
has	O
ended	O
support	O
for	O
Windows	B-Application
Home	I-Application
Server	I-Application
on	O
January	O
8	O
,	O
2013	O
.	O
</s>
<s>
10	O
computers	O
and	O
10	O
users	O
:	O
Allows	O
a	O
maximum	O
of	O
ten	O
user	O
accounts	O
to	O
be	O
created	O
on	O
the	O
server	O
console	O
and	O
ten	O
computers	O
to	O
have	O
WHS	O
connector	O
installed	O
,	O
without	O
any	O
client	B-License
access	I-License
licenses	I-License
.	O
</s>
<s>
Centralized	O
backup	B-Protocol
:	O
Allows	O
backup	B-Protocol
of	O
up	O
to	O
10	O
PCs	B-Device
,	O
using	O
Single-instance	B-Application
storage	I-Application
technology	O
to	O
avoid	O
multiple	O
copies	O
of	O
the	O
same	O
file	O
,	O
even	O
if	O
that	O
file	O
exists	O
on	O
multiple	O
PCs	B-Device
.	O
</s>
<s>
Health	O
monitoring	O
:	O
Can	O
centrally	O
track	O
the	O
health	O
of	O
all	O
PCs	B-Device
on	O
the	O
network	O
,	O
including	O
antivirus	B-Application
and	O
firewall	B-Application
status	O
.	O
</s>
<s>
File	O
sharing	O
:	O
Creates	O
and	O
operates	O
network	B-General_Concept
shares	I-General_Concept
for	O
computers	O
to	O
store	O
the	O
files	O
remotely	O
,	O
acting	O
as	O
a	O
network-attached	B-Application
storage	I-Application
device	O
.	O
</s>
<s>
The	O
files	O
are	O
indexed	B-Algorithm
for	O
fast	O
searching	O
.	O
</s>
<s>
Printer	O
sharing	O
:	O
Allows	O
a	O
print	B-Application
server	I-Application
to	O
handle	O
print	O
jobs	O
for	O
all	O
users	O
.	O
</s>
<s>
Headless	O
operation	O
:	O
No	O
monitor	O
or	O
keyboard	B-Device
is	O
required	O
to	O
manage	O
the	O
device	O
.	O
</s>
<s>
Remote	B-Protocol
administration	I-Protocol
is	O
performed	O
by	O
using	O
the	O
Windows	B-Application
Home	I-Application
Server	I-Application
Console	O
client	O
software	O
provided	O
in	O
the	O
bundle	O
.	O
</s>
<s>
Remote	B-Protocol
Desktop	I-Protocol
Services	I-Protocol
connections	O
to	O
the	O
server	O
are	O
supported	O
while	O
connected	O
to	O
the	O
same	O
LAN	O
.	O
</s>
<s>
Remote	O
access	O
gateway	O
:	O
Allows	O
remote	O
access	O
to	O
any	O
connected	O
PC	B-Device
on	O
the	O
network	O
,	O
including	O
the	O
server	O
itself	O
,	O
over	O
the	O
Internet	O
.	O
</s>
<s>
Media	O
streaming	O
:	O
Can	O
stream	O
media	O
to	O
an	O
Xbox	B-Operating_System
360	I-Operating_System
or	O
other	O
devices	O
supporting	O
Windows	B-Application
Media	I-Application
Connect	I-Application
.	O
</s>
<s>
Selective	O
data	B-Application
redundancy	I-Application
:	O
Guards	O
against	O
a	O
single	O
drive	O
failure	O
by	O
duplicating	O
selected	O
data	O
across	O
multiple	O
drives	O
.	O
</s>
<s>
Add-Ins	O
can	O
be	O
developed	O
using	O
the	O
Windows	B-Application
Home	I-Application
Server	I-Application
SDK	O
,	O
to	O
provide	O
additional	O
services	O
to	O
the	O
client	O
computers	O
or	O
work	O
with	O
the	O
data	O
already	O
on	O
the	O
server	O
.	O
</s>
<s>
Add-ins	O
can	O
also	O
be	O
ASP.NET	B-Application
applications	O
,	O
hosted	O
in	O
IIS	B-Application
6	I-Application
running	O
on	O
WHS	O
.	O
</s>
<s>
Server	O
backup	B-Protocol
:	O
Backs	O
up	O
files	O
which	O
are	O
stored	O
within	O
shared	B-General_Concept
folders	I-General_Concept
on	O
the	O
server	O
to	O
an	O
external	O
hard	B-Device
drive	I-Device
.	O
</s>
<s>
The	O
configuration	O
interface	O
,	O
called	O
the	O
Home	B-Application
Server	I-Application
Console	O
,	O
was	O
delivered	O
as	O
a	O
Remote	B-Protocol
Desktop	I-Protocol
Protocol	I-Protocol
application	O
to	O
remote	O
PCs	B-Device
while	O
the	O
application	O
ran	O
on	O
the	O
server	O
itself	O
,	O
the	O
GUI	B-Application
was	O
rendered	O
on	O
the	O
remote	B-Protocol
system	I-Protocol
.	O
</s>
<s>
The	O
Home	B-Application
Server	I-Application
Console	O
client	O
application	O
could	O
be	O
accessed	O
from	O
any	O
Windows	O
PC	B-Device
.	O
</s>
<s>
The	O
server	O
itself	O
required	O
no	O
video	O
card	O
or	O
peripherals	O
;	O
it	O
was	O
designed	O
to	O
require	O
only	O
an	O
Ethernet	O
card	O
and	O
at	O
least	O
one	O
Windows	B-Application
XP	I-Application
,	O
Windows	B-Application
Vista	I-Application
or	O
Windows	B-Device
7	I-Device
computer	O
.	O
</s>
<s>
Windows	B-Application
Home	I-Application
Server	I-Application
Drive	O
Extender	O
was	O
a	O
file-based	O
replication	O
system	O
that	O
provided	O
three	O
key	O
capabilities	O
:	O
</s>
<s>
Arbitrary	O
storage	O
expansion	O
by	O
supporting	O
any	O
type	O
of	O
hard	B-Device
disk	I-Device
drive	I-Device
(	O
e.g.	O
</s>
<s>
With	O
Drive	O
Extender	O
,	O
users	O
could	O
add	O
larger	O
capacity	O
hard	B-Device
disk	I-Device
drives	I-Device
and	O
then	O
could	O
offline	O
lesser	O
capacity	O
drives	O
to	O
upgrade	O
capacity	O
online	O
.	O
</s>
<s>
Users	O
(	O
specifically	O
those	O
who	O
configure	O
a	O
family	O
's	O
home	B-Application
server	I-Application
)	O
dealt	O
with	O
storage	O
at	O
two	O
levels	O
:	O
Shared	B-General_Concept
Folders	I-General_Concept
and	O
Disks	O
.	O
</s>
<s>
The	O
only	O
concepts	O
relevant	O
regarding	O
disks	O
was	O
whether	O
they	O
had	O
been	O
"	O
added	O
"	O
to	O
the	O
home	B-Application
server	I-Application
's	O
storage	O
pool	O
or	O
not	O
and	O
whether	O
the	O
disk	O
appeared	O
healthy	O
to	O
the	O
system	O
or	O
not	O
.	O
</s>
<s>
This	O
was	O
in	O
contrast	O
with	O
Windows	O
 '	O
Logical	O
Disk	O
Manager	O
which	O
requires	O
a	O
greater	O
degree	O
of	O
technical	O
understanding	O
in	O
order	O
to	O
correctly	O
configure	O
a	O
RAID	B-Architecture
array	I-Architecture
.	O
</s>
<s>
Shared	B-General_Concept
Folders	I-General_Concept
had	O
a	O
name	O
,	O
a	O
description	O
,	O
permissions	O
,	O
and	O
a	O
flag	O
indicating	O
whether	O
duplication	O
(	O
redundancy	B-Application
)	O
was	O
on	O
or	O
off	O
for	O
that	O
folder	O
.	O
</s>
<s>
If	O
duplication	O
was	O
on	O
for	O
a	O
Shared	B-General_Concept
Folder	I-General_Concept
(	O
which	O
was	O
the	O
default	O
on	O
multi-disk	O
Home	B-Application
Server	I-Application
systems	O
and	O
not	O
applicable	O
to	O
single	O
disk	O
systems	O
)	O
then	O
the	O
files	O
in	O
that	O
Shared	B-General_Concept
Folder	I-General_Concept
were	O
duplicated	O
and	O
the	O
effective	O
storage	O
capacity	O
was	O
halved	O
.	O
</s>
<s>
TV	O
shows	O
that	O
had	O
been	O
archived	O
to	O
a	O
Windows	B-Application
Home	I-Application
Server	I-Application
from	O
a	O
system	O
running	O
Windows	B-Device
Media	I-Device
Center	I-Device
)	O
,	O
Drive	O
Extender	O
provided	O
the	O
capability	O
to	O
not	O
duplicate	O
such	O
files	O
if	O
the	O
server	O
was	O
short	O
on	O
capacity	O
or	O
manually	O
mark	O
a	O
complete	O
content	O
store	O
as	O
not	O
for	O
duplication	O
.	O
</s>
<s>
Examples	O
are	O
XBMC	B-Application
,	O
MediaPortal	B-Application
,	O
and	O
Squeezebox	B-Language
Server	I-Language
.	O
</s>
<s>
On	O
23	O
November	O
2010	O
,	O
Microsoft	O
announced	O
that	O
Drive	O
Extender	O
would	O
be	O
removed	O
from	O
Windows	B-Application
Home	I-Application
Server	I-Application
2011	O
.	O
</s>
<s>
Criticism	O
of	O
Drive	O
Extender	O
's	O
removal	O
mainly	O
related	O
to	O
it	O
being	O
seen	O
as	O
a	O
core	O
feature	O
of	O
Windows	B-Application
Home	I-Application
Server	I-Application
and	O
a	O
key	O
reason	O
for	O
adoption	O
.	O
</s>
<s>
As	O
a	O
replacement	O
for	O
Drive	O
Extender	O
,	O
Microsoft	O
stated	O
that	O
OEMs	O
would	O
use	O
RAID	B-Architecture
on	O
their	O
Windows	B-Application
Home	I-Application
Server	I-Application
products	O
.	O
</s>
<s>
Windows	B-Application
Home	I-Application
Server	I-Application
Computer	O
Backup	B-Protocol
automatically	O
backs	O
up	O
all	O
of	O
the	O
computers	O
in	O
a	O
home	O
to	O
the	O
server	O
using	O
an	O
image-based	O
system	O
that	O
ensures	O
point-in-time-based	O
restoration	O
of	O
either	O
entire	O
PCs	B-Device
or	O
specific	O
files	O
and	O
folders	O
.	O
</s>
<s>
Complete	O
bare-metal	B-General_Concept
restores	I-General_Concept
are	O
initiated	O
through	O
a	O
restore	O
bootable	B-Operating_System
CD	I-Operating_System
,	O
file	O
based	O
restores	O
are	O
initiated	O
through	O
the	O
WHS	O
client	O
software	O
which	O
allows	O
the	O
users	O
to	O
open	O
a	O
backup	B-Protocol
and	O
"	O
drag	O
and	O
drop	O
"	O
files	O
from	O
it	O
.	O
</s>
<s>
This	O
technology	O
uses	O
Volume	O
Shadow	O
Services	O
(	O
VSS	O
)	O
technology	O
on	O
the	O
client	O
computer	O
to	O
take	O
an	O
image	O
based	O
backup	B-Protocol
of	O
a	O
running	O
computer	O
.	O
</s>
<s>
Because	O
the	O
backup	B-Protocol
operates	O
on	O
data	O
at	O
the	O
cluster	O
level	O
,	O
single	B-Application
instancing	I-Application
can	O
be	O
performed	O
to	O
minimize	O
the	O
amount	O
of	O
data	O
that	O
travels	O
over	O
the	O
network	O
and	O
that	O
will	O
ultimately	O
be	O
stored	O
on	O
the	O
home	B-Application
server	I-Application
.	O
</s>
<s>
This	O
single	B-Application
instancing	I-Application
gives	O
the	O
server	O
the	O
ability	O
to	O
store	O
only	O
one	O
instance	O
of	O
data	O
,	O
no	O
matter	O
if	O
the	O
data	O
originated	O
from	O
another	O
computer	O
,	O
another	O
file	O
,	O
or	O
even	O
data	O
within	O
the	O
same	O
file	O
.	O
</s>
<s>
Computer	O
backup	B-Protocol
images	O
are	O
not	O
duplicated	O
on	O
the	O
server	O
,	O
so	O
if	O
a	O
server	O
hard	B-Device
drive	I-Device
fails	O
,	O
backups	B-Protocol
could	O
be	O
lost	O
.	O
</s>
<s>
The	O
"	O
Server	O
Backup	B-Protocol
"	O
feature	O
added	O
in	O
Power	O
Pack	O
1	O
does	O
not	O
include	O
duplication	O
of	O
backup	B-Protocol
images	O
.	O
</s>
<s>
The	O
system	O
also	O
offers	O
an	O
SSL	B-Protocol
secured	O
web	B-Application
browser	I-Application
based	O
interface	O
over	O
the	O
Internet	O
to	O
the	O
shared	O
file	O
stores	O
.	O
</s>
<s>
The	O
release	O
version	O
offers	O
access	O
to	O
the	O
web	O
interface	O
via	O
a	O
free	O
Windows	O
Live-provided	O
URL	O
,	O
which	O
uses	O
Dynamic	B-Protocol
DNS	I-Protocol
.	O
</s>
<s>
The	O
system	O
also	O
supports	O
Terminal	B-Protocol
Services	I-Protocol
Gateway	O
,	O
allowing	O
remote	B-Protocol
control	I-Protocol
of	I-Protocol
the	I-Protocol
desktop	I-Protocol
of	O
any	O
Windows	O
computer	O
on	O
the	O
home	O
network	O
.	O
</s>
<s>
Currently	O
supported	O
systems	O
are	O
those	O
which	O
would	O
normally	O
support	O
Remote	B-Protocol
Desktop	I-Protocol
:	O
Windows	B-Application
XP	I-Application
Professional	O
,	O
Tablet	O
and	O
Media	O
Center	O
editions	O
,	O
Windows	B-Application
Vista	I-Application
Business	O
,	O
Enterprise	O
and	O
Ultimate	O
editions	O
and	O
Windows	B-Device
7	I-Device
Professional	O
,	O
Enterprise	O
and	O
Ultimate	O
editions	O
.	O
</s>
<s>
The	O
web	O
interface	O
also	O
supports	O
embedding	O
the	O
Remote	B-Protocol
Desktop	I-Protocol
ActiveX	B-Application
control	I-Application
,	O
to	O
provide	O
remote	O
access	O
to	O
home	O
computers	O
from	O
within	O
the	O
web	O
interface	O
directly	O
.	O
</s>
<s>
Remote	O
sessions	O
can	O
also	O
connect	O
to	O
the	O
Home	B-Application
Server	I-Application
console	O
to	O
configure	O
the	O
server	O
over	O
the	O
internet	O
.	O
</s>
<s>
Windows	B-Application
Home	I-Application
Server	I-Application
allows	O
for	O
developers	O
to	O
publish	O
community	O
and	O
commercial	O
add-ins	O
designed	O
to	O
enhance	O
the	O
Windows	B-Application
Home	I-Application
Server	I-Application
with	O
added	O
functionality	O
.	O
</s>
<s>
As	O
of	O
January	O
2010	O
,	O
nearly	O
100	O
of	O
these	O
add-ins	O
have	O
been	O
developed	O
for	O
WHS	O
,	O
including	O
applications	O
for	O
antivirus	B-Application
&	O
security	O
,	O
backups	B-Protocol
,	O
disk	O
management	O
,	O
automation	O
,	O
media	O
,	O
network/power	O
management	O
,	O
remote	O
access	O
,	O
BitTorrent	O
and	O
more	O
.	O
</s>
<s>
The	O
Windows	B-Application
Home	I-Application
Server	I-Application
SDK	O
(	O
Software	O
Development	O
Kit	O
)	O
provides	O
developers	O
with	O
a	O
set	O
of	O
APIs	O
and	O
tools	O
to	O
use	O
when	O
developing	O
for	O
and	O
extending	O
Windows	B-Application
Home	I-Application
Server	I-Application
.	O
</s>
<s>
Windows	B-Application
Home	I-Application
Server	I-Application
features	O
integration	O
with	O
Windows	B-Application
XP	I-Application
(	O
SP2	O
or	O
newer	O
)	O
,	O
Windows	B-Application
Vista	I-Application
,	O
and	O
Windows	B-Device
7	I-Device
(	O
after	O
the	O
release	O
of	O
Power	O
Pack	O
3	O
)	O
through	O
a	O
software	O
installation	O
,	O
either	O
from	O
a	O
client	O
CD	O
or	O
via	O
a	O
network	B-General_Concept
share	I-General_Concept
.	O
</s>
<s>
The	O
connector	O
software	O
may	O
also	O
be	O
installed	O
by	O
accessing	O
yourserver:55000	O
through	O
a	O
web	B-Application
browser	I-Application
,	O
where	O
a	O
link	O
is	O
provided	O
to	O
download	O
the	O
connector	O
software	O
and	O
to	O
install	O
troubleshooting	O
tools	O
.	O
</s>
<s>
Files	O
stored	O
on	O
Windows	B-Application
Home	I-Application
Server	I-Application
are	O
also	O
available	O
through	O
a	O
Windows	B-Operating_System
share	I-Operating_System
,	O
opening	O
compatibility	O
to	O
a	O
wide	O
variety	O
of	O
operating	B-General_Concept
systems	I-General_Concept
.	O
</s>
<s>
Also	O
,	O
the	O
Administration	O
console	O
is	O
available	O
via	O
Remote	B-Protocol
Desktop	I-Protocol
,	O
allowing	O
administration	O
from	O
unsupported	O
platforms	O
.	O
</s>
<s>
Windows	B-Application
Home	I-Application
Server	I-Application
does	O
not	O
support	O
Microsoft	B-Application
Security	I-Application
Essentials	I-Application
.	O
</s>
<s>
64-bit	O
Windows	O
client	O
support	O
was	O
introduced	O
in	O
Power	O
Pack	O
1	O
,	O
though	O
the	O
Restore	O
Wizard	O
on	O
the	O
Windows	B-Application
Home	I-Application
Server	I-Application
Restore	O
CD	O
is	O
unable	O
to	O
restore	O
clients	O
running	O
64-bit	O
operating	B-General_Concept
systems	I-General_Concept
,	O
due	O
to	O
the	O
fact	O
that	O
the	O
Restore	O
CD	O
does	O
not	O
support	O
64-bit	O
drivers	O
.	O
</s>
<s>
Windows	B-Application
XP	I-Application
Professional	O
x64	O
is	O
n't	O
officially	O
supported	O
.	O
</s>
<s>
However	O
,	O
unofficial	O
workarounds	O
allow	O
Connector	O
software	O
to	O
work	O
on	O
XP	B-Application
x64	O
.	O
</s>
<s>
Integration	O
of	O
the	O
file	O
sharing	O
service	O
as	O
a	O
location	O
for	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
's	O
Time	B-Operating_System
Machine	I-Operating_System
was	O
apparently	O
being	O
considered	O
,	O
but	O
upon	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
Leopard	O
's	O
release	O
,	O
Apple	O
had	O
removed	O
the	O
ability	O
to	O
use	O
the	O
SMB	O
file	O
sharing	O
protocol	O
for	O
Time	B-Operating_System
Machine	I-Operating_System
backups	B-Protocol
.	O
</s>
<s>
One	O
WHS	O
provider	O
,	O
HP	O
,	O
provides	O
their	O
own	O
plug-in	O
with	O
their	O
home	B-Application
server	I-Application
line	O
capable	O
of	O
Time	B-Operating_System
Machine	I-Operating_System
backup	B-Protocol
to	O
a	O
home	B-Application
server	I-Application
.	O
</s>
<s>
Windows	B-Application
Home	I-Application
Server	I-Application
has	O
not	O
officially	O
supported	O
Domain	B-Protocol
Controller	I-Protocol
capability	O
and	O
cannot	O
readily	O
join	O
a	O
Windows	B-General_Concept
Server	I-General_Concept
domain	I-General_Concept
.	O
</s>
<s>
Dedicated	O
devices	O
will	O
have	O
the	O
operating	B-General_Concept
system	I-General_Concept
pre-installed	O
and	O
may	O
be	O
supplied	O
with	O
a	O
server	O
recovery	O
disk	O
which	O
reloads	O
the	O
OS	O
over	O
a	O
network	O
connection	O
.	O
</s>
<s>
This	O
is	O
utilized	O
on	O
the	O
HP	O
MediaSmart	O
Server	O
,	O
and	O
the	O
Fujitsu	O
Siemens	O
Scaleo	O
Home	B-Application
Server	I-Application
.	O
</s>
<s>
The	O
first	O
release	O
of	O
Windows	B-Application
Home	I-Application
Server	I-Application
,	O
RTM	O
(	O
release	O
to	O
manufacturing	O
)	O
,	O
suffered	O
from	O
a	O
file	O
corruption	O
flaw	O
whereby	O
files	O
saved	O
directly	O
to	O
or	O
edited	O
on	O
shares	O
on	O
a	O
WHS	O
device	O
could	O
become	O
corrupted	O
.	O
</s>
<s>
Only	O
the	O
files	O
that	O
had	O
NTFS	B-Application
Alternate	O
Data	O
Streams	O
were	O
susceptible	O
to	O
the	O
flaw	O
.	O
</s>
<s>
Backups	B-Protocol
of	O
client	O
PCs	B-Device
made	O
by	O
Windows	B-Application
Home	I-Application
Server	I-Application
were	O
not	O
susceptible	O
to	O
the	O
flaw	O
.	O
</s>
<s>
Microsoft	O
then	O
issued	O
a	O
list	O
of	O
applications	O
,	O
including	O
Windows	B-Device
Live	I-Device
Photo	I-Device
Gallery	I-Device
,	O
Microsoft	B-Application
OneNote	I-Application
,	O
Microsoft	B-Application
Outlook	I-Application
and	O
SyncToy	B-Application
2.0	O
,	O
which	O
might	O
have	O
triggered	O
the	O
flaw	O
if	O
they	O
were	O
used	O
to	O
edit	O
the	O
files	O
on	O
a	O
WHS	O
share	O
directly	O
.	O
</s>
<s>
Windows	B-Application
Home	I-Application
Server	I-Application
RTM	O
did	O
not	O
include	O
a	O
mechanism	O
for	O
backing	O
up	O
the	O
server	O
.	O
</s>
<s>
Power	O
Pack	O
1	O
added	O
the	O
ability	O
to	O
back	B-Protocol
up	I-Protocol
files	O
stored	O
on	O
the	O
Shared	B-General_Concept
Folders	I-General_Concept
,	O
to	O
an	O
external	O
drive	O
.	O
</s>
<s>
However	O
,	O
there	O
remains	O
no	O
way	O
to	O
back	B-Protocol
up	I-Protocol
the	O
installed	O
server	O
operating	B-General_Concept
system	I-General_Concept
.	O
</s>
<s>
Backing-up	O
of	O
the	O
client	O
backup	B-Protocol
database	O
is	O
available	O
either	O
manually	O
using	O
the	O
instructions	O
provided	O
by	O
Microsoft	O
on	O
page	O
24	O
of	O
or	O
can	O
be	O
done	O
using	O
the	O
WHS	O
BDBB	O
add-in	O
written	O
by	O
Alex	O
Kuretz	O
and	O
available	O
from	O
.	O
</s>
<s>
While	O
some	O
hardware	O
manufacturers	O
have	O
developed	O
dedicated	O
boxes	O
,	O
Microsoft	O
has	O
also	O
released	O
Windows	B-Application
Home	I-Application
Server	I-Application
under	O
the	O
OEM/System	O
Builder	O
license	O
.	O
</s>
<s>
Users	O
can	O
also	O
choose	O
to	O
use	O
an	O
existing	O
PC	B-Device
or	O
build	O
their	O
own	O
systems	O
,	O
which	O
would	O
include	O
the	O
use	O
of	O
WHS	O
System	O
Builder	O
.	O
</s>
<s>
As	O
of	O
23	O
March	O
2009	O
,	O
Microsoft	O
has	O
also	O
made	O
Windows	B-Application
Home	I-Application
Server	I-Application
available	O
to	O
MSDN	O
and	O
Microsoft	O
Technet	O
subscribers	O
.	O
</s>
<s>
Some	O
computer	O
systems	O
are	O
available	O
only	O
with	O
a	O
bundled	O
Windows	B-Application
Home	I-Application
Server	I-Application
license	O
.	O
</s>
<s>
As	O
is	O
the	O
case	O
with	O
other	O
versions	O
of	O
Windows	O
it	O
is	O
possible	O
to	O
request	O
a	O
refund	O
of	O
the	O
license	O
fees	O
paid	O
for	O
Windows	B-Application
Home	I-Application
Server	I-Application
.	O
</s>
