o lol. sorry i was thinkin something totally different. i was thinking AC=mains electricity. man im tired. all i can say is thats strange. have you tried unplugging a couple of other things in your house and running your computer? it could be that all up its drawing too much power and the pc is the last thing and gets cut off. i know it sounds strange but ive messed around with a power board in my room and it acted like that