Is your problem the result of overclocking?
First, you should have posted under XP forum, not CPU forum.
You need to include system specs and details about the problem, any problems you had leading up to the current situation, and any lights, sounds, or other indicators from your system, monitor, or even keyboard.
Please repost this in the correct place with all relevant information.You have to be a little bit crazy to keep you from going insane.