vorallem punkt 2 und 3: 2. Threaded optimization – Go into your nVidia control panel and disable threaded optimization in the 3d management section, either globally or just for ArmA2. 3. Single display mode – Go into your nVidia control panel and switch it from nVidia recommended (multi display) to single display mode in the 3d management section. Admittedly this might be an issue if you run more than one display.)