Yes currently launching and exiting, with some game-play in between ;p

edit: using Comodo Firewall at moment, which is causing no issues with Arma3 as far as I know.

Ah will check it out :D

I have managed to get the game to run by installing Zonealarm then uninstalling Zonealarm, with a system shutdown between each procedure. I have launched the game, attempted the first two showcases and been able to shut the game down with no problems, while running on 'high' settings.

Ok went through the parameters on Steam and .exe launch properties, same error message so far. Then tried to disable all soundcards and devices and launch the game, still no change in error type, then tried stereo mode on main soundcard still no luck.

And to clear up what sound hardware I have; I have an X-FI Creative hardware soundcard and a redundant/disabled integrated motherboard soundcard, as well as a redundant/disabled HDMI audio device on my graphics card.

Additionally I tried using an old version of Gamebooster to cut out any processes that might be interfering (most I already disabled by default using MSConfig).

Anything else I can try?

I dont have an Arma 3 Alpha folder in my appdata\local, maybe that is created once the game launches successfully?

I've had a good search through the Steam forums as well, as for the Arma3 logs where are they located?

I used to have Zonealarm a while ago, but it is currently uninstalled and fully removed. Any further options to try to fix this?