<s>
Cydoor	B-Application
is	O
a	O
spyware	O
and	O
adware	O
first	O
detected	O
in	O
2003	O
.	O
</s>
<s>
The	O
Cydoor	B-Application
software	O
downloads	O
advertisements	O
from	O
the	O
Cydoor	B-Application
servers	O
,	O
to	O
be	O
displayed	O
in	O
the	O
Cydoor-supported	O
software	O
.	O
</s>
<s>
It	O
is	O
built	O
as	O
a	O
program	O
integrated	O
into	O
the	O
parent	O
application	O
but	O
is	O
not	O
uninstalled	B-Application
along	O
with	O
it	O
.	O
</s>
<s>
Cydoor	B-Application
consumes	O
about	O
3.4MB	O
of	O
hard	O
drive	O
space	O
,	O
and	O
cannot	O
be	O
uninstalled	B-Application
using	O
the	O
Windows	B-Application
uninstaller	B-Application
.	O
</s>
<s>
No	O
uninstaller	B-Application
is	O
provided	O
.	O
</s>
<s>
Cydoor	B-Application
is	O
often	O
bundled	O
with	O
commercial	O
Peer-to-peer	O
file	O
sharing	O
programs	O
such	O
as	O
Kazaa	B-Protocol
,	O
iMesh	B-Protocol
and	O
eXeem	B-Protocol
.	O
</s>
<s>
According	O
to	O
Cydoor	B-Application
Desktop	O
Media	O
,	O
the	O
ad	O
technology	O
reaches	O
70	O
million	O
unique	O
users	O
worldwide	O
.	O
</s>
<s>
Formerly	O
,	O
a	O
user	O
could	O
uninstall	B-Application
Cydoor	B-Application
and	O
continue	O
to	O
use	O
the	O
program	O
installed	O
with	O
it	O
,	O
but	O
that	O
is	O
sometimes	O
no	O
longer	O
the	O
case	O
.	O
</s>
<s>
Now	O
Cydoor	B-Application
is	O
treated	O
as	O
a	O
vital	O
piece	O
of	O
software	B-Application
code	I-Application
by	O
the	O
parent	O
program	O
,	O
and	O
removal	O
may	O
cause	O
the	O
program	O
to	O
stop	O
working	O
.	O
</s>
<s>
Programmers	O
have	O
successfully	O
removed	O
Cydoor	B-Application
's	O
software	O
from	O
Kazaa	B-Protocol
(	O
resulting	O
in	O
Kazaa	B-Protocol
Lite	O
and	O
Kazaa	B-Protocol
Resurrection	O
)	O
.	O
</s>
<s>
The	O
program	O
has	O
been	O
known	O
to	O
cause	O
problems	O
in	O
Windows	B-Application
,	O
but	O
the	O
company	O
asserts	O
that	O
this	O
is	O
due	O
to	O
an	O
old	O
and	O
buggy	B-Error_Name
version	O
of	O
the	O
software	O
.	O
</s>
<s>
This	O
software	O
can	O
be	O
removed	O
by	O
most	O
anti-spyware	O
programs	O
,	O
such	O
as	O
Ad-Aware	B-Application
and	O
Spybot	B-Application
-	I-Application
Search	I-Application
&	I-Application
Destroy	I-Application
.	O
</s>
