Primelegend89

I am having trouble first I got the two games from amazon and played them with dayz commander and they were fine and then the new update and on dayz commander it says verify and I tried verifying it on steam still nothing dayz commander wont work and I switched them to steam and it always says 1 file found missing or something like that please help me with this I miss playing dayz and this is blocking it also everytime I join a dayz game it says battle eye client failed to update