My worst computer day was 3 or 4 days ago. 
For awile i had 2 IEXPLORE tasks always open, I assumed there was a virus on my pc because when i tried to close them, they re opend. 
I find the file that was re opening them, i delete it, all seems fine. 
Then, a couple of days later, my computer gets f**kd up 
Couldent acces the internet couldent burn stuff. crappy performance, 
Couldent back up my game saves games include 
F.E.A.R. (finished that anyway so it didnt matter) 
Need for Speed: Most Wanted ( Got 50 percent done) 
Splinter Cell: Chaos Theory ( 5 Missions done - No big loss) 
The Movies ( Was up to the 1990's) 
Painkiller ( No big loss) 
But worst of all 
Grand Theft Auto: San Andreas  I had 50 percent done with 40 hours game time 
And i could not back anything up because i couldent burn or upload to a free upload site or anything  
Not even my very good virus scanner or anything picked up that virus, it came, and owned.