My PC with windows 7 started giving me some issues today. It froze up and then went to the black screen with "Disk boot failure, insert system disk and press enter." I turned it off and then back on a little while later. The screen that says windows was shut down improperly popped up but after that everything looked fine. The same thing happened again about an hour later. So this time I tried to do a system restore through the system restore accessory. That didn't seem to help the issue because the same thing happened again. Not sure what I should try now...any ideas?

Sounds like it might be overheating problems.

I think you're right. Cleaned all the fans earlier and haven't had any issues yet.

Thanks