Game Crash everytime on Clap Trap loading Screen, what to do?

i bought 2 Versions for me and my girldfriend. On my PC all worked fine, on the PC of my girldfriend it doesent.

On Loading screen, when it reaches claptrap dancing, it crashed everytime.
I newly installed the launcher, so its updated and i put in DX11 in the settings, nothing happened.
reinstalled 2 times, always the same error.

Is there any suggestion out there (instead of writing support tickets)?