ok found why. (my game was in administrator vorpx not). So i change my game to not run in administrator
but now i have another problem. i can launch the game with vorpx, i got into menus
but each time i start a mission after some seconds (time the mission is loaded), game exit (like a crash but without any error displayed).
i change settings in my game (resolution, and other settings), tried about 30 launch of the game, but always the same problem (i can run silent hunter 5 without problem without vorpx).
What can i do ? some tips ?