i got a pop up on my screen (in multiple languages) that told me my computer will restart automatically and it did, then another pop up came up and said "my computer restarted because of a problem". im using mac os x 10.7.5 and i understand i'm running an outdated version of mac os x but everything is running fine than all of a sudden it restarts on it's own. it said there was a problem but it never told me what the problem was. why did this happen?