My PC Turns off frequently due to over heating.Even though a hardware overheats and computer turns off. It suggests me to press F4 Button to restart my PC and it runs for a while again it turns off after a few time. I cannot recognize the problem. I Changed My RAM and cooler but the problem was not solved.

Change or check cpu fan. check bios settings. 1/3 of highway deaths are caused by drunks. The rest are by people who can't drive any better than a drunk.
make sure you reapply scrape of old thermal grease apply new one corrcetly and that should solve your problem might have possibley been problem in first place Davidw
