I have a computer that was just imaged but has been rebooting on it's own. I've found something in event viewer. The computer is clean with only about 5 apps installed other than the standard.
The Remote Procedure Call (RPC) service terminated unexpectedly. It has done this 1 time(s). The following corrective action will be taken in 60000 milliseconds: Reboot the machine.
Windows 7 SP1 64 bit