https://www.youtube.com/watch?v=Nz6mcyyP_VkAlrighty, arbiter. I made a video guide on the process on how I get DayZ running. One thing that I did forget to mention before I recorded the video, I deleted all my Arma 2 and DayZ files including the player data saved on my Documents folder on my C:\ drive. So I started out clean and redownloaded the files.
Also, I've opted out of the Betas when going through the properties of A2 and A2 OA.
In summary.
Install and launch Arma 2. (verify files if you already have it installed)
Install and launch Arma 2 Operation Arrowhead. (verify files if you already have it installed)
(Install additional DLC if you have it)
Find DayZ Launcher:
Download DayZ Epoch mod (latest patch)
Download DayZ Overwatch mod (latest patch)
Make sure the mods are in the Arma 2 Operation Arrowhead folder's directory.
Find Beatniks on DayZ launcher and launch the server.
Hopefully no issues then. So I hope this helps.