You can download a free version of Sisoft Sandra from download.com and it will tell you if you are overclocked. An old desktop I had was overclocked by the manufacturer and it kept overheating and freezing up. In my case the front side bus speed was set too high according to Sisoft Sandra. If your computer is a desktop you can add fans to the case openings or into the slots where extra CD rom type drives would fit or where a pci slot is in back.
I've been having restart issues for some time now but I've been unable to figure out what was wrong. I've tried swaping out ram, endless fiddling with drivers and bios settings, etc. Finally it occured to me that 75c sounded pretty damn hot for a cpu. My fan says it is running at around 5,000 RPM though, so I simply assumed that was how hot CPUs are. Now that I've poked around on the internet a little bit, that doesn't seem to be the case.
I restart mostly when I'm doing cpu intensive things- Loading into video games, loading into windows, and playing video games. Very rarely does it restart when I simply idle, chat, or surf the net. It does restart occasionally when doing easy stuff, but only occasionally. When I'm playing games it is VERY spikey, it will restart 10 times in 20 minutes and then be fine for 4 hours.. and then restart 10 more times over the next 30 minutes.
It 'seems' like when I turn down video settings I restart less, which originally made me think it was a video card or memory issue but now leads me to believe it is the lesser stress on the CPU that is important.
Anyone have any suggestions on how I can cool my CPU? I don't 'think' I'm overclocking, but if someone could tell me how to check I would be glad to. I clean my CPU of dust as best I can, but I can't really see deep into there so there might be some dust I can't see clogged in- I don't know how to release the cpu and am really worried about hurting it somehow.
I have an athlon cpu, I don't know the name of the fan but it is very fast. I'm using windows xp if that matters. If you have any other specific questions I'll check this decently often and try to provide answers.