So I bought Arma 3 two days ago and all i have been doing is trying to fix it, im currently trying to play exile and have all the mods etc downloaded. When i join a new server its fine until there is vehicles involved (my theory). As soon as there is a heli or something my game just closes down without a crash code or anything most of the time. On one server im currently close to a traders city and as soon as i log in i instantly crash. If i find a car or anything and go in to it, i crash. I have reinstalled the game and all the mods 2 times, i have disabled antivirus/firewalls on my router and pc, open ports etc. Nothing I do seem to work. My friends on the server tells me it says "steam authentication failed" when im crashing.