Okay so I downloaded DayZ and Arma 2 OA a long time back, probably close to when DayZ first came out. I've played it many times throughout this time and love it, however recently I've had a problem. I have DayZ Commander and have played on it just fine and downloaded all the recent software, but when I go to play on one of the servers it gives me an error "Data file too short 'C:\Program Files (x86)\Steam\steamapps\common\Arma 2 operation Arrowhead\@DayZ\addons\dayz_sfx.pbo'. Expected 32661096 B, got 29325999 B" Then it won't let me play. I googled this problem and someone said: "1. exit STEAM client 2. start STEAM client via 'run as Administrator' 3. select A2: OA in games list by left mouse button 4. right mouse button > menu > choose 'Properties' 5. chooce 'Local Files' tab 6. choose 'Verify Integrity File Cache' 7. wait till it's done" I did this and it told me two files needed to be aquired or something along those lines. I know the whole game isn't corrupted cause I've played it just fine many times in the past, this is a recent problem. Anyone have this same problem and know how to fix it?