How about sending it to the virus chest (quarantine)? You can also upload it to
http://www.virustotal.com to see if it's a FP or not.
If it's not, try running a boot-time scan with avast (if you're not running vista x64) to see if it can get rid of it then.
If not, try malwarebytes from
http://www.malwarebytes.org or SAS from
http://www.superantispyware.comIf all that doesn't work, you should try HiJackThis and post a log for us. (I doubt you'll need to go that far, so I didn't even post a link to it, but google is your friend if you need to find it).
Oh well, I'm up waaaaay too late from trying to fix a problem at a client's office remotely, and I need to hit the sack. Going to be a cruddy day tomorrow.
Good luck!