Well, let say I'm in the middle of something and then just pop's up an error message https://www.google.ca/url?sa=i&rct=j&q=&... Then I Don't have any option other then just turn off the Mac Mini, -It happens when browsing or just by having the Mac Mini Turn On. -The other thing that I notice, (not sure if is for same reason) it goes on StandBy Mode and when trying to wake it up, i does not responde so I have to turn it Off.