I have been playing this game for a long time now, and never seen this. My normal ArmA2 works fine, and my normal OA works fine. But when I launch them together, (i.e. Combined Operations), there is a huge problem.
I can play normally for a matter of anywhere between 10 minutes and 45 minutes. Then my game, without warning, will freeze for a moment, and then go to a black screen (Once it was green) that has a bunch of lines through it, almost as if it were a graphical hardware failure.
I was in Teamspeak each time, and I have about 10 seconds after the crash that I can still function before my whole computer locks up. I can hear people talking and can also still talk to them, but then everything just becomes a low pitched buzzing sound. I have tried to let it sit, Alt-Tabbed, Ctrl+Alt+Del, windows keys, Alt+F4, and even increasing fan speed to cool my graphics card, and nothing works. It wall sit for hours, forcing my to hard boot my computer.
I am running the game on all high settings, but then switched to normal and low, both to no avail. My specs are as follows:
Make/Model: CyberpowerPC Gamer Ultra 2064
Operating System: Windows 7 Home Premium 64-Bit OS
Processor AMD Phenom II X4 925 Processor 2.80 GHz
RAM: 4GB (2 x 2GB) DDR3 1333
Hard Drive: 1TB (1 x 1TB) SATA-II 3.0Gb/s 7200RPM HDD
Graphics: ATI Radeon HD 5670 1GB GDDR5
Power Supply: 600W