Power Blip Panic!

Well I got home, noticed that the programs I had set running on my PC weren't running! Thought hmm it's reset - it's got a virus / spyware / trojen / malware etc.. Thought maybe not but run system checks anyway.. Check another PC - it's was sitting at the XP log in screen (gotta love remote admin that loads as a service before anything!) logged me in, checked the other pc's the same thing. Thought hmm power blip! I was right just enough to make lights flicker but long enough to make PC's go reset :(. Oh and the drive home wasn't much fun either...