Ok i have a very interesting issue i followed every step by launching steam as admin launching both arma 2 and OA. Installed Dayzcommander followed by installing Dayz. now in the install update tab right above Dayz mod it shows arma 2 and OA it is telling me to Validate both of them when i click on Arma 2 it will not process the validation but OA will process and when it finishes it says it has to replace 1 file it claims it does but doesnt change in dayzcommander. Also right besides Dayz where normally it says up to date or install it keeps showing reinstall after installing multiple times. And now the real issue is that when i go to launch the game from Dayzcommander it pops up saying. "there was an error launching Arma 2 with Dayz. please check your directories in the settings panel AND be sure you have the mod installed in the install/update panel. Details: the system can not fine the file specified." If someone can please lend a hand this issue is extremely frustrating. If this info helps any i use to run Arma 2 and OA off steam because i owned a non steam version first. I already uninstalled both arma 2 and OA before installing the steam version.