If you get the "deleted files" error it means that either you have the DayZ files installed in the wrong place or you don't have the correct shortcut to run them.
This article explains exactly how to do this:
http://kodabar.blogspot.co.uk/2012/05/how-to-install-dayz-with-arma-2-free.htmlIf you're still having problems after that, give me a shout and I'll help you fix it.