It seems a lot of people are having trouble with this game on Windows PC. I searched the internet for similar problems, I tried all advices, such as running steam and fallout as administrator, verifying data files, running in windowed mode, not using mods, deleting ini files in my documents folder, running in borderless windowed mode, updating nvidia drivers, disabling nvidia streaming service, etc etc. I've waited for 20+ minutes for the new game to load but it hasn't.
Obviously there's no load existing game option because I've never played it before. The screen doesn't freeze, it just doesn't load.
The game launches successfully, but when I select new game the loading gets stuck there. I recently bought a copy of Fallout 4 via Steam.