Hi! I have been looking for same problems as mine. find one, but mine is a bit diffrent. I have a 2 year old computer, windows vista home premium. I know a littel bit of computers as I build my own. for 2 days ago i played a little in the evening, turned the comp of and went to sleep. In the morning the computer started normally. But after I raised from the tabel, and went to the other room, and returned the computer was turened off. I tried to boot it again, but it only staid running for 10 sec. -when I try to boot it (when it has rested for 5 min) it comes all the way to the "windows noticed that the computer hasnt shut donw correctly"- window(and you have to choose safe mode/normal mode), and then shuts off. -when I try to start it afterwards (after a few times of trying) it only runs for 3 sec. It sounds like the Powers source is giving upp...? my girlfriends dad was in the room one day and said the computer sounded wierd, I must say I havent noticed anything about the sound of the fans. Please help, I payed a lot for the computer and I really need it for my schoolwork! Thanks in advance!