How do I undo the safe mode? Yes, undo. I once had a problem with the game, and took it in safe mode. Now it never asks again, and I have NO idea how to undo the safe mode. It takes itself to the lowest detail level and resolution. So that, I can not undo the changes in the game, because the menus dont even fit in the screen thanks to the lowest resolution thing.
So, how can I close safe mode? (I tried uninstalling-installing).
A fable problem, safe mode
I remember that I also got this problem before last year. If I remember clearly, what I would normally do is to close the game as soon as this happens. Then, I'll go to the start menu and try to start up the game from there (click on the normal mode, not the safe mode option). It returned to normal afterwards. You can also try to restart Windows to see if it works or not. Hope this helps. 
''They say truth is the first casualty of war. But who defines what's true? Truth is just a matter of perspective. The duty of every soldier is to protect the innocent, and sometimes that means preserving the lie of good and evil, that war isn't just natural selection played out on a grand scale. The only truth I found is that the world we live in is a giant tinderbox. All it takes...is someone to light the match" - Captain Price