Hi, I have a problem with my PC and need help, I'm not sure how to diagnose it. Basically I get a lot of reboots, no blue screens, no warnings, no error messages. Sometimes it'll do it as soon as I start up and reboot 2 or 3 times before it settles and I can use it. Over times it'll boot up fine, than all of a sudden without warning it'll reboot. I'm going to guess it's a hardware fault, but I have no spare parts to swap over and test etc How do I start to diagnose this problem? I'll get the hardware specs up in the morning and I'm running windows 7 ultimate 64bit.