Jul 152015
 

https://forums.geforce.com/default/topic/489124/geforce-500-400-series/driver-install-stuck-on-3d-vision-driver/

Solution that worked for me:

  1. Start Task Manager
  2. Find GFExperience.exe *32
  3. End Process
  4. Re-launch GeForce Experience from system tray
  5. Installation completes successfully

This also seems to have fixed a problem with games not optimizing. I’d been putting off reinstalling drives from scratch (clean install) so this is a nice bonus.