So much to my horror i've been unable to run Fallout 4 in fullscreen on any setting my computer is almost brand new with a Nvidia 960M 4GB card so it isn't the specs at fault.
When the initial options menu pop up before the game launches, it doesn't seem to matter what graphics settings I cycle through, if it's windowed it runs fine (boarderless and non-boarderless) but when I click run full screen I get a blank screen with the little windows mouse cursor icon doing the loading animation. After waiting a good period of time I try clicking around the screen to see if it's still responsive and the game window greys over and I have to force the program to end.
I did manage to get it to start full screen once and the sound started playing but was left with a flickering screen flashing in and out of the beginning credits and all the keys were non-functional. Had to Ctrl Alt Delete to get back to the desktop.
I'm running a Lenovo Y50 with Win 8.1. All drivers up to date. Steam copy of the game.
Tried Windows hotkey combination for full screen which is Alt+Enter, no luck.
Real frustrating as the game only takes up 1/3rd of the screen so it's hard to play!
Please fix it soon! :'( :'(