This is my first time playing DayZ SA in about 3-4 months. I start it up in steam and it gives me the Battleye EULA and ToS. I click accept and it asks me to run as the current operator (admin) or some other operator. I Then proceed to click the "Ok" button whilst the cmd console for DayZ_BE.exe is in the background saying "Installing BattlEye Service...". When I click "Ok" on the Run As window the console then says "Failed to install BattlEye Service..." then almost immediately after, closes the window. It doesn't help to validate game cache or download the .dll file and replace it.