I realize this is a pretty general problem so please bear with me. I thought this had to do with my RAM so I removed all but one 4GB, ran MEM86 on it and it turned out fine. My computer still reboots randomly. I feel like it might be IO related but I don't know how to test it. My C: is SSD and I have hard drive's connected as well. All internal. EventLog only shows me that the computer unexpectedly shut down but no error code as to why it did so. Any tips on what tools there are to diagnose these things?