Um, guys? My fiancee is a virus tech for Symantec and one thing I can tell you is that Anti-virus software WILL NOT help you once you have a virus. Norton Anti-Virus states on the box that you shouldn't install it at all if you think you're infected.
That said, symantec's site does have massive amounts of free information on how to remove just about any virus out there. Once you've done that, I STRONGLY reccomend purchasing/borrowing/acquiring Norton AntiVirus. It costs some money, but not as much as getting your computer nuked will cost you. The new one, sircam, is capable of COMPLETELY wiping your HD.