I'm having a problem with a Dell Lattitude C640 laptop with XP Pro that I hope I can resolve. The CPU will stay at 100% with just Windows processes running. I have reformatted and installed XP Pro 5 times now and each time the CPU processes will eventually max out at 100% usually after the computer is shut down and restarted. I'm thinking I have a hardware issue since XP Pro has been running on this computer for well over a year with no problems until now. Any ideas ?