<s>
Windows	B-Application
Live	I-Application
OneCare	I-Application
Safety	I-Application
Scanner	I-Application
(	O
formerly	O
Windows	B-Application
Live	I-Application
Safety	I-Application
Center	I-Application
and	O
codenamed	B-General_Concept
Vegas	O
)	O
was	O
an	O
online	O
scanning	O
,	O
PC	O
cleanup	O
,	O
and	O
diagnosis	O
service	O
to	O
help	O
remove	O
of	O
viruses	O
,	O
spyware/adware	O
,	O
and	O
other	O
malware	O
.	O
</s>
<s>
On	O
November	O
18	O
,	O
2008	O
,	O
Microsoft	O
announced	O
the	O
discontinuation	O
of	O
Windows	O
Live	O
OneCare	O
,	O
offering	O
users	O
a	O
new	O
free	O
anti-malware	B-Application
suite	O
Microsoft	B-Application
Security	I-Application
Essentials	I-Application
,	O
which	O
had	O
been	O
available	O
since	O
the	O
second	O
half	O
of	O
2009	O
.	O
</s>
<s>
However	O
,	O
Windows	B-Application
Live	I-Application
OneCare	I-Application
Safety	I-Application
Scanner	I-Application
,	O
under	O
the	O
same	O
branding	O
as	O
Windows	O
Live	O
OneCare	O
,	O
was	O
not	O
discontinued	O
during	O
that	O
time	O
.	O
</s>
<s>
The	O
service	O
was	O
officially	O
discontinued	O
on	O
April	O
15	O
,	O
2011	O
and	O
replaced	O
with	O
Microsoft	B-Application
Safety	I-Application
Scanner	I-Application
.	O
</s>
<s>
Windows	B-Application
Live	I-Application
OneCare	I-Application
Safety	I-Application
Scanner	I-Application
offered	O
a	O
free	O
online	O
scanning	O
and	O
protection	O
from	O
threats	O
.	O
</s>
<s>
The	O
Windows	B-Application
Live	I-Application
OneCare	I-Application
Safety	I-Application
Scanner	I-Application
must	O
be	O
downloaded	O
and	O
installed	O
to	O
your	O
computer	O
to	O
scan	O
your	O
computer	O
.	O
</s>
<s>
The	O
virus	B-Application
scanner	I-Application
on	O
the	O
Windows	B-Application
Live	I-Application
OneCare	I-Application
Safety	I-Application
Scanner	I-Application
site	O
runs	O
a	O
scan	O
of	O
the	O
user	O
's	O
computer	O
only	O
when	O
the	O
site	O
is	O
visited	O
.	O
</s>
