I have to admit that I haven't used a virus scanner in ages. My reasoning is that if I have my files backed up, I can always just format my hard drive.
I decided this morning that since I'm too lazy to go throught the trouble of backing up my files once a week or so, I should get a virus scanner, especially since I'm downloading off of ftps posted in alt.2600.warez.
I used to use McAfee a long time ago, but I hated it. It was always running and scanning in the background, causing my apps and games to slow down. What used to really piss me off was when I'd be playing Unreal and it would start scanning the Unreal executable!! That used to fuck everything up.
Is there a virus scanner that either by default just scans downloaded files or can be configured to scan only downloaded files? I don't need it scanning every time I open something.