I'm at a friend's place right now, and I scanned this friend's computer for bad stuff. It finds software that tracks where you go on the Web, stuff that causes advertisements to show up, and lots more. I was so amused at the result of the scans that I actually took and cropped some screenshots of it. If you can guess which of my friends it is, I'll give you a LiveJournal invite code or something. You only get ONE guess. :)
The other computer in the room had 611 naughty objects to remove. *lol* SO scary...!!!