I thought it may be a heat issue, so I enabled my notebooks fanboost option, but it made no difference.
No other game on this system crashes. I can run Battlefield 3 in Very High detail mode, and a number of other games which are all highly system intensive (Max Payne 3, FarCry 3, DCS A-10 etc) and all run without a hitch, for hours on end. Arma 3 is the first game I've experienced this with, and I have over 100 games on my Steam account alone.
I hope you can help, as I would really love to play A3.
If you require any other information, please let me know.