Just did it again as I was typing. I just received it 2 days ago. BIOS 1.3.6. It randomly reboots at an undetermined amount of time. Just realized others were having the same issue. I am going to pack it up and send it back if I can't resolve this by a firmware or BIOS upgrade. I did buy it refurbished to save some money. If anyone is experiencing the same issue feel free to add to this thread.