Something doesn't seem right there, you may have a virus.
Run Adaware, Spybot (both are free applications) and your anti-virus scanner. I also double check with a free online scanner just to be sure, there is a good one here..
http://housecall.trendmicro.com/hous...start_corp.asp
When you're at housecall, it will need to download a small file onto your PC to be able to do the scan, but don't worry, it's perfectly safe
Here is a very good thread to read with lots of info..
http://www.gnutellaforums.com/showth...threadid=41432