Crash to Desktop - Help

[nukemoon1]

So far the game has worked fine with minimal problems (crash at loading screens but restarting the game fixed that) but now every time I click the door in the church basement to go to the main compound, it crashes to the desktop and nothing has solved this problem not even restarting the game. I have updated my drivers, verified my game-cache files, and I even ran the game on the lowest settings but nothing has worked. I am running the game through steam and I am using a laptop (Windows 7 64 bit).