Fun story: The new nvidia driver crashed my computer constantly to the point where I had to do a clean install of windows and more to stop it.
If it's still giving you trouble, go to your nvidia control panel and turn anything with a performance setting to performance as opposed to quality. I've suggested it to 4 friends with the same problem, we're all doing fine now.
Another option, at least in my case, was to adjust the fan speed for my graphics card using another program. Running fallout was causing it to overheat and then stop working.