I left my computer on the logon screen on vista for about a day, and when i got back it was on sleep mode i guess. the only problem was that everything was unresponsive. so i just turned the computer off with the power button. When I started the computer again I have all these horizontal lines across the screen and 3 vertical ones that split the screen. I've tried going back into sleep mode and bringing it out again to see if that works, installing just about every vista driver for it, reinstalling vista and everything. I have vista on a different hard drive then XP, and I still have lines in xp too though. I replaced the 7900gto with a 7300le, and the lines are still there. So what could be the problem and what could I do to try and fix it?