<s>
Microsoft	B-Application
Safety	I-Application
Scanner	I-Application
is	O
a	O
free	B-License
virus	B-Application
scanner	I-Application
similar	O
to	O
Windows	B-Application
Malicious	I-Application
Software	I-Application
Removal	I-Application
Tool	I-Application
that	O
can	O
be	O
used	O
to	O
scan	O
a	O
system	O
for	O
computer	O
viruses	O
and	O
other	O
forms	O
of	O
malware	O
.	O
</s>
<s>
It	O
was	O
released	O
on	O
15	O
April	O
2011	O
,	O
following	O
the	O
discontinuation	O
of	O
Windows	B-Application
Live	I-Application
OneCare	I-Application
Safety	I-Application
Scanner	I-Application
.	O
</s>
<s>
However	O
,	O
it	O
can	O
be	O
run	O
on	O
a	O
computer	O
that	O
already	O
has	O
an	O
antivirus	B-Application
product	O
without	O
any	O
potential	O
interference	O
,	O
and	O
can	O
therefore	O
be	O
used	O
to	O
scan	O
a	O
potentially	O
infected	O
computer	O
as	O
a	O
second	O
check	O
from	O
another	O
antivirus	B-Application
program	I-Application
.	O
</s>
<s>
It	O
uses	O
the	O
same	O
detection	O
engine	O
and	O
malware	O
definitions	O
as	O
Microsoft	B-Application
Security	I-Application
Essentials	I-Application
and	O
Microsoft	B-General_Concept
Forefront	I-General_Concept
Endpoint	I-General_Concept
Protection	I-General_Concept
.	O
</s>
<s>
,	O
part	O
of	O
Microsoft	B-Application
Safety	I-Application
Scanner	I-Application
's	O
end-user	O
license	O
agreement	O
which	O
restricts	O
its	O
use	O
reads	O
:	O
</s>
