* BORDERLESS WINDOW, NOT WINDOWLESS, sorry for that.
The game won't launch if it is not in borderless mode. A black screen appears my pc fans start working, I see the windows pointer indicating that something is loading, but nothing actually loads, which forces me to close the game. No resolution works this way if I go fullscreen.
However, by using Windowed mode it doesn't get any better. I can at least launch the game, but the max resolution is capped at 1440x880, although I have a 1080p monitor. This is ridiculous. After changing the resolution manually in Fallout4prefs.ini, NOTHING HAPPENS. The file is a joke and isn't used by the actual game. Laughable.
TL;DR: I'm forced to play FO4 with a 1440x880 window because of crap launcher settings and a useless .ini file.