I uploaded this files
arma3_2014-02-15_12-28-59.zip (looks interessting)
arma3_2014-02-15_12-27-16.zip
arma3_2014-02-15_14-49-46.zip

the Env. is still arma3_2014-02-07_22-03-22.DxDiag.txt
with 3 Screens, but playing at the just one.
the used RAM of arma is around 1.5GB, almost the limit with Win32-Programms
I used high graphic-settings, almost all with ultra

in all 3 cases arma freeze a while (1 - 2 minutes), because it takes so long I switched back to desktop. Arma becomes a gray overlay from windows (like no reactions)
it take a others while windows says "the arma-Programm is crashed!".

so, I tried. When arma freezed I did wait a long time (sometimes with looping sounds) and Arma come back and I can continue playing. But it freezed again and again ...

so I will try now playing with lower graphic-settings.

I did reinstall Win7, not only about that Errors here. After reinstalling, everythink works fine for me. I think for me, it was some kind of a drive missmatch, after changing hardware.

@Astaroth I uploaded my files

unfortunately I can not reproduce this in one way, but it happends a lot. sometimes it runs 30 min then just 5 min at different situations