I came home from the store, and my computer was turned off. I always leave it on. When i powered it up, it gave me an error that it was shutdown due to a "thermal event". And it gave me the option to his F1 to continue booting, or F2 to boot into the setup. I looked at the event log, and there was an error with the CPU dealing with heat. I have a Dell 8400, 3.2 ghz, 1 gb ram, 256mb 6800 GT . Less than 2 weeks ago my power supply went bad, and dell sent me a new one to replace it. Anyone know if this is a serious problem, or what could have caused it?