I've got x64 Ultimate and it just won't install. At any random time during the installation, the screen will go black and the computer will become non-responsive. This has been happening to me with every version of 7 i've tried... 6801, 7000, 7100, 32-bit, 64-bit... everything. One time it actually did finish the install and I got to the desktop, but about 10 minutes later it "crashed" without warning. The screen just went black and the computer wouldn't respond to any kind of input. I thought it might have been the GPU screwing up, so i swapped out my BFG 8800gt for my KFA 8800gt and still got the same problem, so i'm thinking it's a mobo problem? ga-p35-ds3r q6600 8800gt It's not the discs, because i've tried them in my laptop and they work perfectly fine. Any ideas?