Unchecked the "reboot on error" box, still happened. Oh well, can't say I didn't try. I also ran Dr. Watson, no errors. There is also no mention of system restarts in the events log.
I just downloaded a diagnostic tool for my hard drive off of Samsung's web site, and am about to go run it. I'll post and let you know what happens with that.
I know its not a virus/malware issue
I have kept my computer clean of that junk since day 1.