OK guys, this problem just happen to me too, MTA refusing to open, I'm going to do what Gandalf told but, my pc crashes often in some situations like:
-icecream truck with that funny music playing, either me or someone passing by.
-riding the icecream truck
-riding firetruck
does someone have the same problem, or if you never noticed that and your pc crashes try check it cause it may be the same problem.
BTW, why are you gandalf the white? and not gandalf the grey?  
