<s>
Microsoft	B-Application
Defender	I-Application
Antivirus	I-Application
(	O
formerly	O
Windows	B-Application
Defender	I-Application
)	O
is	O
an	O
antivirus	B-Application
software	I-Application
component	O
of	O
Microsoft	B-Application
Windows	I-Application
.	O
</s>
<s>
It	O
was	O
first	O
released	O
as	O
a	O
downloadable	O
free	O
anti-spyware	O
program	O
for	O
Windows	B-Application
XP	I-Application
and	O
was	O
shipped	O
with	O
Windows	B-Application
Vista	I-Application
and	O
Windows	B-Device
7	I-Device
.	O
</s>
<s>
It	O
has	O
evolved	O
into	O
a	O
full	O
antivirus	B-Application
program	I-Application
,	O
replacing	O
Microsoft	B-Application
Security	I-Application
Essentials	I-Application
in	O
Windows	B-Application
8	I-Application
or	O
later	O
versions	O
.	O
</s>
<s>
In	O
March	O
2019	O
,	O
Microsoft	O
announced	O
Microsoft	B-Application
Defender	I-Application
ATP	O
for	O
Mac	B-Application
for	O
business	O
customers	O
to	O
protect	O
their	O
Mac	B-Application
devices	O
from	O
attacks	O
on	O
a	O
corporate	O
network	O
,	O
and	O
a	O
year	O
later	O
,	O
to	O
expand	O
protection	O
for	O
mobile	O
devices	O
,	O
it	O
announced	O
Microsoft	B-Application
Defender	I-Application
ATP	O
for	O
Android	B-Application
and	O
iOS	B-Application
devices	O
,	O
which	O
incorporates	O
Microsoft	B-Application
SmartScreen	I-Application
,	O
a	O
firewall	B-Application
,	O
and	O
malware	O
scanning	O
.	O
</s>
<s>
The	O
mobile	O
version	O
of	O
Microsoft	B-Application
Defender	I-Application
also	O
includes	O
a	O
feature	O
to	O
block	O
access	O
to	O
corporate	O
data	O
if	O
it	O
detects	O
a	O
malicious	O
app	O
is	O
installed	O
.	O
</s>
<s>
As	O
of	O
2021	O
,	O
Microsoft	B-Application
Defender	I-Application
Antivirus	I-Application
is	O
part	O
of	O
the	O
much	O
larger	O
Microsoft	B-Application
Defender	I-Application
brand	O
,	O
which	O
includes	O
several	O
other	O
software	O
and	O
service	O
offerings	O
,	O
including	O
:	O
</s>
<s>
Before	O
Windows	B-Application
8	I-Application
,	O
Windows	B-Application
Defender	I-Application
only	O
protected	O
users	O
against	O
spyware	O
.	O
</s>
<s>
It	O
includes	O
a	O
number	O
of	O
real-time	O
security	O
agents	O
that	O
monitor	O
several	O
common	O
areas	O
of	O
Windows	B-Application
for	O
changes	O
which	O
might	O
have	O
been	O
caused	O
by	O
spyware	O
.	O
</s>
<s>
It	O
also	O
has	O
the	O
ability	O
to	O
remove	O
installed	O
ActiveX	B-Application
software	O
.	O
</s>
<s>
Windows	B-Application
Defender	I-Application
featured	O
an	O
integrated	O
support	O
for	O
Microsoft	B-Device
SpyNet	I-Device
that	O
allows	O
users	O
to	O
report	O
to	O
Microsoft	O
what	O
they	O
consider	O
to	O
be	O
spyware	O
,	O
and	O
what	O
applications	O
and	O
device	O
drivers	O
they	O
allow	O
to	O
be	O
installed	O
on	O
their	O
systems	O
.	O
</s>
<s>
Protection	O
against	O
viruses	O
was	O
subsequently	O
added	O
in	O
Windows	B-Application
8	I-Application
;	O
which	O
resembles	O
Microsoft	B-Application
Security	I-Application
Essentials	I-Application
(	O
MSE	O
)	O
.	O
</s>
<s>
It	O
also	O
uses	O
the	O
same	O
anti-malware	B-Application
engine	O
and	O
virus	O
definitions	O
from	O
MSE	O
.	O
</s>
<s>
In	O
Windows	B-Application
10	O
,	O
Windows	B-Application
Defender	I-Application
settings	B-Application
are	O
controlled	O
in	O
the	O
Windows	B-Application
Defender	I-Application
Security	O
Center	O
.	O
</s>
<s>
In	O
the	O
Windows	B-Application
10	O
Anniversary	O
Update	O
,	O
a	O
new	O
logo	O
is	O
introduced	O
and	O
a	O
pop-up	O
notification	O
will	O
appear	O
to	O
announce	O
the	O
results	O
of	O
a	O
scan	O
,	O
even	O
if	O
no	O
viruses	O
are	O
found	O
.	O
</s>
<s>
In	O
the	O
Windows	B-Application
Defender	I-Application
options	O
,	O
the	O
user	O
can	O
configure	O
real-time	O
protection	O
options	O
.	O
</s>
<s>
Windows	B-Application
10	O
's	O
Anniversary	O
Update	O
introduced	O
Limited	O
Periodic	O
Scanning	O
,	O
which	O
optionally	O
allows	O
Windows	B-Application
Defender	I-Application
to	O
scan	O
a	O
system	O
periodically	O
if	O
another	O
antivirus	B-Application
app	O
is	O
installed	O
.	O
</s>
<s>
Integration	O
with	O
Internet	B-Application
Explorer	I-Application
and	O
Microsoft	B-Application
Edge	I-Application
enables	O
files	O
to	O
be	O
scanned	O
as	O
they	O
are	O
downloaded	O
to	O
detect	O
malicious	O
software	O
inadvertently	O
downloaded	O
.	O
</s>
<s>
As	O
of	O
April	O
2018	O
,	O
Microsoft	B-Application
Defender	I-Application
is	O
also	O
available	O
for	O
Google	B-Application
Chrome	I-Application
via	O
an	O
extension	O
and	O
works	O
in	O
conjunction	O
with	O
Google	B-Application
Safe	I-Application
Browsing	I-Application
,	O
but	O
as	O
of	O
late	O
2022	O
,	O
this	O
extension	O
is	O
now	O
deprecated	O
.	O
</s>
<s>
A	O
feature	O
released	O
in	O
early	O
2018	O
,	O
Windows	B-Application
Defender	I-Application
Application	O
Guard	O
is	O
a	O
feature	O
exclusive	O
to	O
Microsoft	B-Application
Edge	I-Application
that	O
allows	O
users	O
to	O
sandbox	O
their	O
current	O
browsing	O
session	O
from	O
the	O
system	O
.	O
</s>
<s>
Application	O
Guard	O
is	O
a	O
feature	O
only	O
available	O
on	O
Windows	B-Application
10	O
Pro	O
and	O
Enterprise	O
.	O
</s>
<s>
In	O
May	O
2019	O
,	O
Microsoft	O
announced	O
Application	O
Guard	O
for	O
Google	B-Application
Chrome	I-Application
and	O
Firefox	B-Application
.	O
</s>
<s>
The	O
extension	O
,	O
once	O
installed	O
,	O
will	O
open	O
the	O
current	O
tabs	O
web	O
page	O
in	O
Microsoft	B-Application
Edge	I-Application
with	O
Application	O
Guard	O
enabled	O
.	O
</s>
<s>
Controlled	O
Folder	O
Access	O
is	O
a	O
feature	O
introduced	O
with	O
Windows	B-Application
10	O
Fall	O
Creators	O
Update	O
to	O
protect	O
a	O
user	O
's	O
important	O
files	O
from	O
the	O
growing	O
threat	O
of	O
ransomware	O
.	O
</s>
<s>
Windows	B-Application
will	O
warn	O
the	O
user	O
with	O
a	O
User	O
Account	O
Control	O
popup	O
as	O
a	O
final	O
warning	O
if	O
they	O
opt	O
to	O
"	O
Allow	O
"	O
a	O
program	O
to	O
read	O
Controlled	O
Folders	O
.	O
</s>
<s>
Windows	B-Application
Defender	I-Application
was	O
initially	O
based	O
on	O
GIANT	O
AntiSpyware	O
,	O
formerly	O
developed	O
by	O
GIANT	O
Company	O
Software	O
,	O
Inc	O
.	O
</s>
<s>
While	O
the	O
original	O
GIANT	O
AntiSpyware	O
officially	O
supported	O
older	O
Windows	B-Application
versions	O
,	O
support	O
for	O
the	O
Windows	B-Application
9x	O
line	O
of	O
operating	O
systems	O
was	O
later	O
dropped	O
by	O
Microsoft	O
.	O
</s>
<s>
At	O
the	O
2005	O
RSA	O
Security	O
conference	O
,	O
Bill	O
Gates	O
,	O
the	O
Chief	O
Software	O
Architect	O
and	O
co-founder	O
of	O
Microsoft	O
,	O
announced	O
that	O
Microsoft	O
AntiSpyware	O
would	O
be	O
made	O
available	O
free-of-charge	O
to	O
users	O
with	O
validly	O
licensed	O
Windows	B-Application
2000	I-Application
,	O
Windows	B-Application
XP	I-Application
,	O
and	O
Windows	B-Application
Server	I-Application
2003	I-Application
operating	O
systems	O
to	O
secure	O
their	O
systems	O
against	O
the	O
increasing	O
malware	O
threat	O
.	O
</s>
<s>
On	O
November	O
4	O
,	O
2005	O
,	O
it	O
was	O
announced	O
that	O
Microsoft	O
AntiSpyware	O
was	O
renamed	O
to	O
Windows	B-Application
Defender	I-Application
.	O
</s>
<s>
Windows	B-Application
Defender	I-Application
(	O
Beta	O
2	O
)	O
was	O
released	O
on	O
February	O
13	O
,	O
2006	O
.	O
</s>
<s>
The	O
core	O
engine	O
was	O
rewritten	O
in	O
C++	B-Language
,	O
unlike	O
the	O
original	O
GIANT-developed	O
AntiSpyware	O
,	O
which	O
was	O
written	O
in	O
Visual	B-Language
Basic	I-Language
.	O
</s>
<s>
Also	O
,	O
since	O
Beta	O
2	O
,	O
the	O
program	O
works	O
as	O
a	O
Windows	B-Application
service	O
,	O
unlike	O
earlier	O
releases	O
,	O
which	O
enables	O
the	O
application	O
to	O
protect	O
the	O
system	O
even	O
when	O
a	O
user	O
is	O
not	O
logged	O
on	O
.	O
</s>
<s>
Beta	O
2	O
also	O
requires	O
Windows	B-Application
Genuine	O
Advantage	O
(	O
WGA	O
)	O
validation	O
.	O
</s>
<s>
However	O
,	O
Windows	B-Application
Defender	I-Application
(	O
Beta	O
2	O
)	O
did	O
not	O
contain	O
some	O
of	O
the	O
tools	O
found	O
in	O
Microsoft	O
AntiSpyware	O
(	O
Beta	O
1	O
)	O
.	O
</s>
<s>
Microsoft	O
removed	O
the	O
System	O
Inoculation	O
,	O
Secure	O
Shredder	O
and	O
System	O
Explorer	O
tools	O
found	O
in	O
MSAS	O
(	O
Beta	O
1	O
)	O
as	O
well	O
as	O
the	O
Tracks	O
Eraser	O
tool	O
,	O
which	O
allowed	O
users	O
to	O
easily	O
delete	O
many	O
different	O
types	O
of	O
temporary	O
files	O
related	O
to	O
Internet	B-Application
Explorer	I-Application
6	I-Application
,	O
including	O
HTTP	B-Application
cookies	I-Application
,	O
web	B-Protocol
cache	I-Protocol
,	O
and	O
Windows	B-Device
Media	I-Device
Player	I-Device
playback	O
history	O
.	O
</s>
<s>
German	O
and	O
Japanese	O
versions	O
of	O
Windows	B-Application
Defender	I-Application
(	O
Beta	O
2	O
)	O
were	O
later	O
released	O
by	O
Microsoft	O
.	O
</s>
<s>
On	O
October	O
23	O
,	O
2006	O
,	O
Microsoft	O
released	O
the	O
final	O
version	O
of	O
Windows	B-Application
Defender	I-Application
.	O
</s>
<s>
It	O
supports	O
Windows	B-Application
XP	I-Application
and	O
Windows	B-Application
Server	I-Application
2003	I-Application
;	O
however	O
,	O
unlike	O
the	O
betas	O
,	O
it	O
does	O
n't	O
run	O
on	O
Windows	B-Application
2000	I-Application
.	O
</s>
<s>
Windows	B-Application
Defender	I-Application
had	O
additional	O
functionality	O
in	O
Windows	B-Application
Vista	I-Application
which	O
was	O
removed	O
in	O
subsequent	O
versions	O
of	O
Windows	B-Application
:	O
</s>
<s>
They	O
provide	O
views	O
of	O
startup	O
programs	O
,	O
currently	O
running	O
software	O
,	O
network	O
connected	O
applications	O
,	O
and	O
Winsock	B-Application
providers	O
(	O
Winsock	B-Library
LSPs	I-Library
)	O
.	O
</s>
<s>
The	O
first	O
and	O
last	O
categories	O
carry	O
a	O
link	O
to	O
learn	O
more	O
about	O
the	O
particular	O
item	O
,	O
and	O
the	O
second	O
category	O
invites	O
users	O
to	O
submit	O
the	O
program	O
to	O
Microsoft	B-Device
SpyNet	I-Device
for	O
analysis	O
by	O
community	O
members	O
.	O
</s>
<s>
The	O
Software	O
Explorer	O
feature	O
has	O
been	O
removed	O
from	O
Windows	B-Application
Defender	I-Application
in	O
Windows	B-Device
7	I-Device
.	O
</s>
<s>
Windows	B-Application
Defender	I-Application
in	O
Windows	B-Application
Vista	I-Application
automatically	O
blocks	O
all	O
startup	O
items	O
that	O
require	O
administrator	O
privileges	O
to	O
run	O
(	O
this	O
is	O
considered	O
suspicious	O
behavior	O
for	O
a	O
startup	O
item	O
)	O
.	O
</s>
<s>
This	O
automatic	O
blocking	O
is	O
related	O
to	O
the	O
User	O
Account	O
Control	O
functionality	O
in	O
Windows	B-Application
Vista	I-Application
,	O
and	O
requires	O
users	O
to	O
manually	O
run	O
each	O
of	O
these	O
startup	O
items	O
each	O
time	O
they	O
log	O
in	O
if	O
they	O
desire	O
the	O
item	O
to	O
run	O
at	O
startup	O
.	O
</s>
<s>
Windows	B-Application
Defender	I-Application
was	O
released	O
with	O
Windows	B-Application
Vista	I-Application
and	O
Windows	B-Device
7	I-Device
,	O
serving	O
as	O
their	O
built-in	O
anti-spyware	O
component	O
.	O
</s>
<s>
In	O
Windows	B-Application
Vista	I-Application
and	O
Windows	B-Device
7	I-Device
,	O
Windows	B-Application
Defender	I-Application
was	O
superseded	O
by	O
Microsoft	B-Application
Security	I-Application
Essentials	I-Application
,	O
an	O
antivirus	B-Application
product	O
from	O
Microsoft	O
which	O
provided	O
protection	O
against	O
a	O
wider	O
range	O
of	O
malware	O
.	O
</s>
<s>
Upon	O
installation	O
,	O
Microsoft	B-Application
Security	I-Application
Essentials	I-Application
disabled	O
and	O
replaced	O
Windows	B-Application
Defender	I-Application
.	O
</s>
<s>
In	O
Windows	B-Application
8	I-Application
,	O
Microsoft	O
upgraded	O
Windows	B-Application
Defender	I-Application
into	O
an	O
antivirus	B-Application
program	I-Application
very	O
similar	O
to	O
Microsoft	B-Application
Security	I-Application
Essentials	I-Application
for	O
Windows	B-Device
7	I-Device
and	O
using	O
the	O
same	O
virus	O
definition	O
updates	O
.	O
</s>
<s>
Microsoft	B-Application
Security	I-Application
Essentials	I-Application
itself	O
does	O
not	O
run	O
on	O
Windows	B-Application
versions	O
beyond	O
7	O
.	O
</s>
<s>
In	O
Windows	B-Application
8	I-Application
and	O
Windows	B-Application
10	O
,	O
Windows	B-Application
Defender	I-Application
is	O
on	O
by	O
default	O
.	O
</s>
<s>
It	O
switches	O
itself	O
off	O
upon	O
installation	O
of	O
a	O
third-party	O
anti-virus	B-Application
package	O
.	O
</s>
<s>
Windows	B-Device
Server	I-Device
2016	I-Device
was	O
the	O
first	O
version	O
of	O
Windows	B-Application
Server	O
to	O
include	O
Windows	B-Application
Defender	I-Application
.	O
</s>
<s>
Until	O
Windows	B-Application
10	O
version	O
1703	O
,	O
Windows	B-Application
Defender	I-Application
had	O
a	O
dedicated	O
GUI	O
similar	O
to	O
Microsoft	B-Application
Security	I-Application
Essentials	I-Application
.	O
</s>
<s>
Additionally	O
,	O
Windows	B-Application
Security	O
and	O
Maintenance	O
tracked	O
the	O
status	O
of	O
Windows	B-Application
Defender	I-Application
.	O
</s>
<s>
With	O
the	O
first	O
release	O
of	O
Windows	B-Application
10	O
,	O
Microsoft	O
removed	O
the	O
"	O
Settings	B-Application
"	O
dialog	O
box	O
from	O
Windows	B-Application
Defender	I-Application
's	O
GUI	O
in	O
favor	O
of	O
a	O
dedicated	O
page	O
in	O
the	O
Settings	B-Application
app	O
.	O
</s>
<s>
Then	O
,	O
in	O
the	O
1703	O
update	O
,	O
Microsoft	O
tried	O
to	O
merge	O
both	O
Windows	B-Application
Defender	I-Application
's	O
GUI	O
and	O
Windows	B-Application
Security	O
and	O
Maintenance	O
into	O
a	O
unified	O
UWP	O
app	O
called	O
Windows	B-Application
Defender	I-Application
Security	O
Center	O
(	O
WDSC	O
)	O
.	O
</s>
<s>
With	O
the	O
release	O
of	O
Windows	B-Device
Server	I-Device
2016	I-Device
,	O
Microsoft	O
introduced	O
a	O
Defender	O
module	O
for	O
PowerShell	B-Application
,	O
which	O
allows	O
interacting	O
with	O
Windows	B-Application
Defender	I-Application
via	O
a	O
command-line	B-Application
interface	I-Application
(	O
CLI	O
)	O
.	O
</s>
<s>
Microsoft	O
continued	O
to	O
decouple	O
the	O
management	O
front-end	O
from	O
the	O
core	O
antivirus	B-Application
.	O
</s>
<s>
In	O
addition	O
,	O
to	O
WDSC	O
and	O
PowerShell	B-Application
,	O
it	O
is	O
possible	O
to	O
manage	O
the	O
antivirus	B-Application
via	O
Windows	B-Protocol
Admin	I-Protocol
Center	I-Protocol
,	O
Group	O
Policy	O
,	O
WMI	B-Library
,	O
Microsoft	B-Application
Endpoint	I-Application
Manager	I-Application
.	O
</s>
<s>
and	O
Microsoft	B-Application
Intune	I-Application
's	O
"	O
tenant	O
attach	O
"	O
feature	O
.	O
</s>
<s>
In	O
Windows	B-Application
10	O
version	O
1707	O
,	O
Microsoft	O
renamed	O
Windows	B-Application
Defender	I-Application
,	O
calling	O
it	O
Windows	B-Application
Defender	I-Application
Antivirus	I-Application
.	O
</s>
<s>
Windows	B-Application
Firewall	B-Application
and	O
Microsoft	B-Application
SmartScreen	I-Application
also	O
saw	O
their	O
names	O
changed	O
to	O
Windows	B-Application
Defender	I-Application
Firewall	B-Application
and	O
Windows	B-Application
Defender	I-Application
SmartScreen	B-Application
.	O
</s>
<s>
Microsoft	O
added	O
other	O
components	O
under	O
the	O
"	O
Windows	B-Application
Defender	I-Application
"	O
brand	O
name	O
,	O
including	O
Windows	B-Application
Defender	I-Application
Application	O
Guard	O
(	O
WDAG	O
)	O
,	O
Window	O
Defender	O
Exploit	O
Guard	O
(	O
WDEG	O
)	O
,	O
Windows	B-Application
Defender	I-Application
Application	O
Control	O
,	O
and	O
Windows	B-Application
Defender	I-Application
Advanced	O
Threat	O
Protection	O
(	O
Defender	O
ATP	O
)	O
.	O
</s>
<s>
A	O
year	O
later	O
,	O
Microsoft	O
began	O
dissolving	O
the	O
Windows	B-Application
Defender	I-Application
brand	O
in	O
favor	O
a	O
of	O
the	O
cloud-oriented	O
"	O
Microsoft	B-Application
Defender	I-Application
"	O
brand	O
.	O
</s>
<s>
The	O
company	O
removed	O
WDSC	O
from	O
the	O
brand	O
in	O
the	O
1809	O
update	O
,	O
renaming	O
it	O
Windows	B-Application
Security	O
Center	O
(	O
WSC	O
)	O
.	O
</s>
<s>
The	O
2004	O
update	O
renamed	O
Windows	B-Application
Defender	I-Application
Antivirus	I-Application
,	O
calling	O
it	O
Microsoft	B-Application
Defender	I-Application
Antivirus	I-Application
,	O
as	O
Microsoft	O
extended	O
Defender	O
ATP	O
's	O
capabilities	O
beyond	O
the	O
Windows	B-Application
OS	I-Application
.	O
</s>
<s>
Windows	B-Application
Defender	I-Application
Offline	O
(	O
formerly	O
known	O
as	O
Standalone	O
System	O
Sweeper	O
)	O
is	O
a	O
stand-alone	O
anti-malware	B-Application
program	O
that	O
runs	O
from	O
bootable	O
removable	O
media	O
(	O
e.g.	O
</s>
<s>
CD	O
or	O
USB	O
flash	O
drive	O
)	O
designed	O
to	O
scan	O
infected	O
systems	O
while	O
the	O
Windows	B-Application
operating	I-Application
system	I-Application
is	O
offline	O
.	O
</s>
<s>
Since	O
Windows	B-Application
10	O
Anniversary	O
Update	O
in	O
2016	O
,	O
the	O
option	O
to	O
boot	O
into	O
Windows	B-Application
Defender	I-Application
Offline	O
can	O
be	O
initiated	O
from	O
within	O
Windows	B-Application
itself	O
,	O
negating	O
the	O
need	O
for	O
the	O
separate	O
boot	O
disk	O
.	O
</s>
<s>
was	O
released	O
to	O
the	O
general	O
public	O
on	O
June	O
2022	O
for	O
Windows	B-Application
10	O
,	O
Windows	B-Application
11	O
,	O
macOS	B-Application
,	O
Android	B-Application
,	O
and	O
iOS	B-Application
devices	O
.	O
</s>
<s>
On	O
Windows	B-Application
it	O
works	O
alongside	O
Microsoft	O
's	O
first	O
and	O
third-party	O
antivirus	B-Application
solutions	O
,	O
such	O
as	O
Microsoft	B-Application
Defender	I-Application
Antivirus	I-Application
.	O
</s>
<s>
Microsoft	B-Application
Defender	I-Application
for	O
Individuals	O
requires	O
a	O
Microsoft	O
365	O
personal	O
or	O
family	O
license	O
.	O
</s>
<s>
Microsoft	B-Application
Defender	I-Application
for	O
Individuals	O
is	O
a	O
stand-alone	O
app	O
that	O
adds	O
central	O
management	O
with	O
visibility	O
of	O
family	O
devices	O
,	O
as	O
well	O
as	O
Identity	O
Theft	O
Monitoring	O
(	O
in	O
supported	O
regions	O
)	O
to	O
existing	O
anti-malware	B-Application
features	O
on	O
Windows	B-Application
devices	O
.	O
</s>
<s>
On	O
macOS	B-Application
and	O
Android	B-Application
,	O
the	O
app	O
includes	O
its	O
own	O
anti-malware	B-Application
protection	O
and	O
on	O
Android	B-Application
and	O
iOS	B-Application
it	O
also	O
includes	O
web	O
protection	O
(	O
malicious	O
link	O
detection	O
)	O
.	O
</s>
<s>
On	O
May	O
5	O
,	O
2017	O
,	O
Tavis	O
Ormandy	O
,	O
a	O
vulnerability	O
researcher	O
from	O
Google	B-Application
,	O
discovered	O
a	O
security	O
vulnerability	O
in	O
the	O
JavaScript	B-Language
analysis	O
module	O
(	O
NScript	O
)	O
of	O
Microsoft	O
Antimalware	B-Application
Engine	O
(	O
MsMpEngine	O
)	O
that	O
impacted	O
Windows	B-Application
Defender	I-Application
,	O
Microsoft	B-Application
Security	I-Application
Essentials	I-Application
and	O
System	O
Center	O
Endpoint	O
Protection	O
.	O
</s>
<s>
During	O
a	O
December	O
2017	O
test	O
of	O
various	O
anti-malware	B-Application
software	O
carried	O
out	O
by	O
AV-TEST	O
on	O
Windows	B-Application
10	O
,	O
Windows	B-Application
Defender	I-Application
earned	O
6	O
out	O
of	O
6	O
points	O
in	O
detection	O
rate	O
of	O
various	O
malware	O
samples	O
,	O
earning	O
its	O
"	O
AV-TEST	O
Certified	O
"	O
seal	O
.	O
</s>
<s>
During	O
a	O
February	O
2018	O
"	O
Real-World	O
Protection	O
Test	O
"	O
performed	O
by	O
AV-Comparatives	O
,	O
Windows	B-Application
Defender	I-Application
achieved	O
a	O
100%	O
detection	O
rate	O
of	O
malicious	O
URL	O
samples	O
,	O
along	O
with	O
3	O
false	O
positive	O
results	O
.	O
</s>
<s>
An	O
AV-TEST	O
test	O
of	O
Windows	B-Application
Defender	I-Application
in	O
October	O
2019	O
demonstrated	O
it	O
provides	O
excellent	O
protection	O
both	O
against	O
viruses	O
and	O
0-day	O
/	O
malware	O
attacks	O
.	O
</s>
