Coming to a hard drive near you, the worst computer viruses yet: AT&T Virus: Every three minutes it tells you what great service you're getting. MCI Virus: Every three minutes it reminds you that you're paying too much for the AT&T virus. Paul Revere Virus: Warns of impending hard disk attack -- once if by LAN, twice if by C:>. Politically Correct Virus: Never calls itself a "virus." Instead, it's an "electronic microorganism." Government Spokesman Virus: Nothing works, but all your diagnostic software says everything is fine.