Does Microsoft Antispyware identify this and offer to clean it?
If so, and if it isn't successful, please try this:
1) submit a Tools, suspected spyware report.
Out of approximately 5 million downloads of Microsoft Antispyware, perhaps 3
million of us have chosen to participate in Spynet-- The cleaning and
detection reports, as well as the "suspected spyware reports" are crucial to
keeping this program, which will remain free to licensed Windows users, up
to date.
2) Restart your machine in safe mode, and do a full, deep scan--repeating
until a scan comes through clean.
3) If that doesn't do the job, here's a thread where this issue is being
worked:
http://forum.gladiator-antivirus.com/index.php?&act=ST&f=170&t=22597
It doesn't end conclusively, but working with HijackThis, in a spyware
forum, is the next thing to try if Microsoft Antispyware is not yet up to
this job.