Hi guys, same situation here... got the game... and tried to start the game from steam and directly from the exe in Arma 3 folder without success.
reinstalled the game... uninstalled antivirus... but no luck.
in both situations I get to load the launcher with the yellow PLAY button at the bottom left screen... but when I press it nothing hapends... and a pop up error appears...
when opened with Steam says "error code 81"... and opened directly from the Arma 3 folder says "Application load error Q;0000065432"
I hope this helps to get closer to a solution.
ledper