Reinstalling them usually solves the problem instantly.

Graphics drivers: Another rare cause why this issue occurs is because of either outdated or invalid graphics drivers installed on your computer.

This frame rate might prove the opposite when you are switching scenes or starting a game.

Capped frame rate: Fallout 4 has the option to cap your frame rate so it doesn’t go beyond a certain limit.

It seems that Fallout 4 takes more time to load if you are playing in full screen.

Fullscreen mode: Even though the majority of the users think that using a full screen reduces the load of the computer, in fact, it is quite opposite.

Vertical Sync: NVIDIA’s vertical sync is known to improve the gameplay of several PCs but it is also known to cause several different conflicts and issues with the games which aren’t optimized to run with it.

Performing a workaround for this might fix the issue.

Bug in the game: Even though this is a rare occurrence, we found several cases where there was a bug and the game was taking longer than usual.

Overriding this setting in the configurations file might fix the problem.

Threads: Another instance can be where there are not an appropriate number of threads being run/executed for your game.

Slow disk access means that the game will take more time transferring data from your HDD drive to your RAM.

Slow disk access: A lot of our users reported that it was because of slow disk access that they were having issues when loading the game.

Fallout 4 faster loading screens mod