I had no problems with this driver, and I didn't do anything special either. Just ran the executable. I will add though that I only install the base driver and the PhysX driver, and that's it. No audio, no GeForce Experience, or any of the other parts. It worked perfectly on both my primary system with a 980 and my secondary system with a 750Ti. I have not updated my HTPC with a GT 630 in it, as that computer gets updated drivers much less frequently, since there's no benefit to it. That one does get the audio driver though.
/facepalm - this was my leet post. Lame.