Endless \"loading Windows\"

I played myself calmly at night in Fallout: New Vegas, did not touch anyone, but just sat and played. Well, I temporarily ended my adventure with the decision to go to sleep. Well, I wake up in the morning and decide to continue the adventure, through this beautiful post-apocalyptic world, and I notice that Windows loads endlessly, while I tried all the ways to start it (like "Windows last good boot", etc. etc. ) and none of them helped. So what's the problem? Did PeKa fly off or Windows (and will it have to be reinstalled?)?
PS I have Windows 7 Professional x64, if that.
UPD:
Maybe it's all because of the Nvidia drivers? I remember a week ago I saw a topic with the same problem as mine, well, in short, the guy solved this problem by reinstalling Windows, but the problem, in fact, was in the drivers from Nvidia (Game Ready for Batman: Arkham Knight, sort of). And he wasn't the only one with this problem.
Well, I have the same driver, but there is one thing, but my installer of these drivers hung at the very end (I don’t remember which driver was installed), well, I had to close it with the task manager. And when entering GeForce Experience in the "drivers" tab, it was written that the driver was installed and everything was fine.