If you're having problems re-installing the game and the other fixes outlined in various threads haven't worked for you (my case) then try downgrading the NVIDIA driver from 378.49 to 375.70. This worked for me, and I was able to re-install the game from scratch w/out using the safe mode w/networking option which *didn't* work for me earlier.
Also curious, does anyone out there with re-install problems have a non-NVIDIA based GPU?