Any help anyone can offer would be most appreciated, I feel I have no options left. I've just completely re-installed Vista Ultimate X64 again and re-installed 2 games once all the necessary drivers were installed. World of Warcraft and Left 4 Dead. The game still freezes, completely, within a couple hours of play, usually inside of 30 minutes. I can discern no pattern to the freezing. CTL+ALT+DEL does nothing, the computer must be rebooted at the tower. I have tried absolutely everything anyone could suggest before I re-installed windows. Now even my last resort has failed. I did not, however, re-format my hard drive. I never got the option during the windows install like I normally would with an XP install. I don't know if that would matter or not, seems unlikely to me at this point. Any suggestions, directions, help of any kind would be very appreciated. I'm about to give up completely. The computer has run flawlessly for two years and started acting up a couple of months back, just after WoW's 3.1 patch. I don't know if it was before or after the patch and I don't know if there is any correlation. I use this machine primarily for gaming, Warcraft in particular. I did check several other threads that had some suggestions. Run Hard Drive Diagnostic: I have a Seagate hard drive and the diagnostic says I have no compatible drive installed. There are no drivers from the seagate website, it states they are not necessary to use their drives with Vista. Memory diagnostic: I ran the windows memory tool and it came up with zero errors after two passes. I don't really know what that means, but that's what it said. Heat: I have literally 11 fans inside a monster case plus the 3 individual RAM fans on the machine. As the problems cropped up after 2 years of solid performance I'm inclined to believe it's not a heat issue. Please, suggest anything, I'll give it a go. This thing is a paperweight at the moment. Thanks in advance.