Well I bought an SSD and installed my OS on it, I wanted to play DayZ on it so I took my arma 2 and arma 2 oa foldres out of my steamapps folder (which is on my hard drive NOT SSD) and put them into a folder on my SSD. It runs perfectly when I play DayZ, but when I try to play regular multiplayer or update oa to 99153 it doesn't work, it just kicks me out of the multiplayer games and the updater says "Arma 2 OA is not installed on your computer or the installation is corrupt". So is there anyone who plays their Steam bought Arma 2/Arma 2 OA with the folders moved outside of the steamapps folder?