it happened about a week after fallout 4 came out i try and launch the game it starts up for like 5 secs then shuts me back to desktop i have tried talking to bethesda support team but they where 0 help and tried all i could try on the things i read its been going on since it first did this and that was two weeks after the game came out and still nothing please help

Tried a game cache verify?

Have you been able to play it at all?

ya i played it for a week then took a brake and it has not been able to run since and i belive i have tried that

Try the game cache verify.

ALso delete the ini files here: C:\............\Documents\My Games\Fallout4

As well as rename the saves folder.