So far I have done the following: -Installed ARMA 2 -Played ARMA2 for a bit -Installed operation arrowhead -played OA for a bit -Installed DayzCommander -Updated OA using DayzCommander -Installed DayZ using DayZCommander -Experienced the above problem trying to start DayZ by selecting a server from DayZ commander -Played more OA having seen a post somewhere saying this might help load some of the files needed -Experienced the above problem trying to start DayZ by selecting a server from DayZ commander -Bought, installed and played BAF thinking that would update all the files with BAF in the title. -Experienced the above problem trying to start DayZ by selecting a server from DayZ commander -Reinstalled everything -Experienced the above problem trying to start DayZ by selecting a server from DayZ commander -Tried starting the game from the settings menu of dayZCommander, this time I got the error window when starting the game and then when I try and select a server I get an error message at the waiting for host screen. Basically it lists all the .pbo files in the baf\addons directory saying they are not signed by a key accepted by this server, remove listed files or install additional accepted keys. When I click continue I get kicked off the game. Removing the files makes the game crash when started. OK, I just on a hunch tried doing multiplayer in OA. Although my version was listed as ver 1.62 it was in red as if I didn't have the correct version for all the servers. I am now patching OA manually and will hopefully have a positive result.