Hey Guys (Cibic & Slim):

Machine just auto-rebooted again, no error messages or blue screen despite that the auto reboot on failure option is disabled.

One more insight I have noticed: I leave my machine on 24/7. Not a single once in the 7 months I had it it rebooted or froze while I was away. It only happens while I am using it. Even when I stream content (I have divx connected, the device just streams but it uses the machine's CPU and VGA card to process the media) it never happened. It has to be me physically using it.