After .61 stable I experienced the same issue many other people have now. A memory read/write error what is randomly caused without a logical reason. In my case, it happens when you are searching for a server, playing the game for a little amount of time or when you stop playing DayZ. I've found out that DayZ had the possibility to play the game on x64 what seems to work for now. Might have been some issues in the latest update of .61 for playing at 32 bits.
--> DayZ should automatically start at 64-bits since most PC's and laptops are.
https://www.reddit.com/r/dayz/comments/5huk6r/here_is_a_way_to_always_run_64bit_dayz/ is the temporary workaround.