Launcher not launching game

  • so recently I've re downloaded steam on a USB and after that my dz launch stopped launching the game when ever i click the arrow to start it and even in advanced tab it doesn't do anything I've reset the location for the Arma 2 file and mods I've reinstalled Arma 2, Arma 2 OA and the launcher and restarted my pc lots of times does anyone got ideas?