I have Armed Assault And Queen's Gambit Expansion.I have also vista 64 bit edition, i think that is my reason.
Ati Radeon hd4870 x2 (2gb)
Intel Core Quad CPU Q9550 2,83 Ghz
Asus Rampage Formula
8Gb ram memory
1500Gb hard drive.
When i start Armed Assault it just loads on black screen, i have installed latest beta 1.15, wasnt it?