It happened when I booted up this morning I downloaded an emulator that had been sent to me and something wasn't right I thought it was just the program but I noticed my system was bogged down so I look in Hijack this and everything seemed ok I ran spybot it found stuff then locked up so I started AVG Anti Spyware and my virus scan which I was unaware were running at the same time the virus scan was fine and nothing cam up the spyware is still running after 2 1/2 hours of scanning.
Things do tend to get slower when I have AIM running though I scanned AIM with AIM fix and it didn't find anything.
So far all that AVG's found are tracking cookies.
Edit: 3 downloaders were found and deleted everything is ok now.