I built this system a year ago specifically for Windows Vista. I installed Windows 7 32 bit a couple days ago. There were no issues during the install. Everything was detected and I had absolutely no conflicts after installation. Smooth, fast and wonderful. Now for the issue...
I was sitting here watching TV not looking at my screen. I'd say about 10-15 minutes went by. I reach over during a commercial break to grab my mouse and nothing was functioning. The download I had going that was open in the middle of my screen was stopped, the keyboard wouldn't function the mouse wouldn't move..nothing. I had to manually power off the system. When I turned it back on the computer would not POST! I had to unplug it, plug it back in and wait about 5 minutes before the system would post. Bios defaults loaded and then system booted. I woke up this morning and the system was dead again. I had to power it off and again it would not boot. I had to unplug it and wait awhile. About 5 minutes later (while in windows) I moved my mouse cursor and automatically the system locked again. I had to reboot and this time the system booted up without my having to unplug and sit. I locked the computer and went to work. I just got home about 20 minute ago, turned on my monitor and could not type in my password to log back in, once again it was dead. Power cycled and it booted up fine again.
Now on one hand this sounds like hardware issue then on the other hand it sounds like a software issue or a combination of both. However I am reluctant to go the hardware route because when its working its working great and up until Saturday I've been running Vista Ultimate for the past year without 1 single issue even remotely close to this problem.
I figured maybe Windows 7 turns on power saving options that Vista didn't. So I went in and turned off sleep/hibernate options and what not. I don't know if that will be the fix or not or if anyone else has already ran into this and fixed this another way. If I'm the only one having this problem among Windows 7 users then I'm even more confused.