The latest driver released on dec 1 specifically for Just Cause 3 and some other new game, is causing serious issues for Fallout 4. I've noticed severe lag and stuttering when going into the pip boy at certain areas. It's been happening for a few days in a row and the only thing I can think of was that I updated to the latest driver. I rolled back to the 358.91, nov 9 release specifically for FO4 launch, and all is fine.