"Windows Resource Protection did not find any integrity violations." So no problems there...
This seemed to do the trick! I indeed had 375.57 installed, and by coincidence, today my GeForce app...

Thanks for all the tips, guys. I'll try them out tonight. Not to keen to install third party tools, but If the driver update and / or the system scan doesn't work, I might give it a try anyway.

Nobody with the same problem or a possible solution? :(

Since recently, I can't drag en drop icons from my start menu to my desktop anymore... When I click the icon and drag it to the desktop, I see it on the desktop, with the overlay that a shortcut will...