Computer helpline joke

Customer: Computer helpline? I cleaned my computer and now it doesn't work any more.
Repairman: What did you clean it with?
Customer: Soap and water.
Repairman: Don't you know you're not supposed to touch a computer with water?
Customer: Oh, it wasn't the water that caused the problem...it was the spin dryer!
Customer: I think I've got a bug in my computer.
Repairman: Does your computer make a humming noise?
Customer: Yes.
Repairman: Then it must be a humbug!