Unable to launch DayZ due to Arma not launch Combined Ops(Steam)

[c0ltkiller 0]

I recently bought Arma 2 Combined Operations off steam. I have ran both Arma 2 and Arrowhead. Then I tried to launch as Combined Operations and it didnt work. It still doesnt work and now I can't play DayZ(sole reason I bought Arma). Does anyone have any ideas on how I can get Combined Operations to work? Whenever I hit launch it opens a black command prompt and words come up real fast and then it self-closes. I have tried running Steam as an admin and I've verified the files. I'm out of ideas on what to do. Please help me.

[Street (DayZ) 0]

I have the same problem and am looking for an answer, good luck

[cyberzone10 3]

the command that close very fast are fine because its like that

But if your waiting arma 2 launches that long for more than 5 min. Then you need to reinstall because some of your files might be corrupted >.<