From Stan Arthur on the LinkedIn Premiere Pro group yesterday (28 Sept 2016):

If you find that your Windows 10 updated itself over-night, chances are that it broke your Nvidia driver in ways that could render certain effects and plug-ins useless. I used the GeForce Experience app, the custom install tab and did a clean install. It worked.

Download the GeForce Experience App here, and change your Microsoft auto-update settings.