I recently bought the ArmA 2/OA bundle from Steam, and whilst OA runs fine, ArmA 2 refuses to load, giving the error message:
"Not enough physical memory / swap file space for 1478656 KB"
Now, this seems unlikely to me, as I know I have ~3.5GB of RAM in my computer, and task manager tells me I have ~2.6GB available. (see linked image)
Any ideas what might be causing this? I am happy to post DxDiag or further specs as requested.