Start only Arma II. Not OA and not DayZ. Look at the right bottom of the menu. If your version there is 1.07XXXXX then you have to download and install the 1.11 patch for Arma II http://www.arma2.com/index.php?option=com_rokdownloads&view=file&id=777%3Aarma2-patch-1&Itemid=20〈=en Then try to run DayZ. This solved all problems for me. The signed data and the dayz_anim issue. Hope it helps :)