Ok so about 6 months ago my dad bought an HP p6674y Desktop. Two days ago it failed to boot to windows 7 home premium. I ran the diagnostics that came with the HP's motherboard. It checked everything (CPU, RAM, S.M.A.R.T. status, Hard drive's connection to the motherboard) and everything checked out fine. But after the motherboards boot screen the screen goes black. Nothing, besides a little underscore (_) blinking in the top left of the screen. I really hate windows because there is no way to find out what failed like there is in linux. Does anybody have any ideas? I just ran a Norton scan and all we have is 18 tracking cookies that where deleted. Unless you have a bulletproof plan I really dont want to reboot the desktop. I got it up and running after leaving it without power all night long. What could be the problem?