My brother just turned on my family's PC and got a message before the post screen about a CPU over temperature error (the PC had been powered off all night). I checked in the BIOS, and it was reporting the CPU temperature to be 107°C/224°F. I immediately shut the PC down, and disconnected it from the wall. I then opened up the case, and plugged it back in to the wall. The CPU cooling fan came on, and the heatsink was just slightly warm to the touch. Then I shut it back down, and connected the keyboard, mouse and monitor to it and powered it back up. I got the warning again, and checked the BIOS and received the same temperature reading (and it does fluctuate about 2 or 3 degrees up or down as I watch it). Does it look like something is wrong with the temperature sensor? I have not removed the heatsink since the CPU was installed (and it is the original HSF), and the PC had been off for over 12 hours when it was first turned on, it never got a chance to overheat. Nothing changed on the PC at all. It was fine when it was shut down, and then came back up with the error. Any ideas?