You are among friends on this one =/. I myself have been searching for hours on a fix and I am in the same boat as you as far as having up to date drivers etc etc. SO one alternative I never thought of that could help is someone said that sometimes during installation certain files can possibly not be applied properly so I'd say you have nothing to lose with trying out a fresh re-install.

Other potential solution is you can "whitelist" the game under the nvidia control panel. Here is a video to help with that =). Don't worry that it's not your computer he's talking about, it applies to others as well =).

Anyways I'll try to help as much as I can but I'm stuck as well so hopefully we can figure this out =(.