Hello if anyone can help me find out my my fallout 4 is crashing when i launch it?

You've not really given us anything to go on, please post a Dxdiag.

Click start ---- search ----type Dxdiag. (Win 7 onwards0

Or search -- Dxdiag (Win 10)

Wait fit to finish then, click save all information, save it to a text file then copy/paste the text from the file to here.