My game crashes to desktop every time i go down the elevator in the mass fusion building, it crashes exactly when the synth opens the door in front of the elevator as it descends. I have updated all my drivers, i have repaired the file with steam, I have tried borderless mode and all the solutions I can find on the internet. I have no mods installed, and have played up to this point in the game with no problems at all. I cannot beat the game. I have tried loading earlier saves and nothing has worked. My PC specs are:

Windows 7 ultimate 64 bit, 8gb ram, Intel quad core i5, Geforce gtx 760.