I got this from Digg Comments
Them: Hey, can I ask you a question?
Me: Just did, didn't you?
Them: My computer is slow, do you think I have a virus?
Me: Sure do, probably tons of spyware, malware, rootkit's and probably a couple of trojans too!!
Them: What can I do about it? Can you come over and fix it?
Me: I can come over and install Linux for you.
Them: Thats too hard to work, can't you just remove the bad stuff?
Me: I was, I was removing Windows.