Good Guy Griff

Still doesn't work.

I have already looked at this many times and it doesn't help me.

Every time I try to join a DayZ server, it says waiting for host and then a pretty lengthy message pops up. The full message is as follows. Files "C:\Program Files (x86)\Bohemia Interactive\Arma 2 Operation Arrowhead\expansion\dta\core.pbo", "C:\Program Files (x86)\Bohemia Interactive\Arma 2 Operation Arrowhead\expansion\addons\air_e.pbo", "C:\Program Files (x86)\Bohemia Interactive\Arma 2 Operation Arrowhead\expansion\addons\animals_e.pbo", "C:\Program Files (x86)\Bohemia Interactive\Arma 2 Operation Arrowhead\expansion\addons\anims_e.pbo", "C:\Program Files (x86)\Bohemia Interactive\Arma 2 Operation Arrowhead\expansion\addons\ca_e.pbo", "C:\Program Files (x86)\Bohemia Interactive\Arma 2 Operation Arrowhead\expansion\addons\characters_e.pbo", ... are not signed by a key accepted by this server. To play on this server, remove listed files or install additional accepted keys. I am playing with ArmA 2: Free and a disc copy of Op. Arrowhead.