I have a strange problem for a couple of years now. For some reson my PC would just reboot itself for ne reason. On ocassion it could keep before the bios setup had finished numerous times and remain in this loop. I,ve since changed to Linux (Ubuntu 8.10). The PC still on ocassion turns itself off IE: It wont reboot just turns off but the fan remains running. In order to reboot it I have to turn if off at the power point as the PC buttons have no effect.