It looks like Steam isn't running or you dont own ARMA 3

  • This happens each time I try and open my A3 Launcher I have tried everything from my Arma 3 path to re downloading the luancher completly and still I make no progress each time.

  • Try right click on the shortcut & always run it in admin mode.

    Right click = properties = compatibility = tick always run in admin mode =apply