I have this acer aspire 5741 laptop here and for some odd reason it completley shuts down when booting up windows 7, it gets to the starting windows screen and after 2 seconds it just shuts down. Ive already tried another hard drive on it and replaced the ram sticks incase that was the problem. The CPU isnt running hot and if i go into the bios the laptop can stay in there for hours without shutting down, i doubt it could be a deleted master boot record or something, any advice will help really, thanks in advance.