Hello thanks for you work but
i tried all this before, I reinstalled the video card drivers with the clean installation checkbox enabled, I reinstalled the game ~5 times already, I also tried copy the documents/Dayz Exp to documents/Dayz with steam cloud off. I also cleaned the registry using the tags dayz and bohemia nothing helps me i really cant understand how this works.
I also want to clarify that the number of players on the server does not affect freezes, I checked whether the game works on official servers with less than 10 people online.
Another detail that I noticed when in the game I press esc and exit on the stable version the screen freezes on the 15 second countdown, while on the experimental branch the countdown goes as it should until the end.