We have been playing around NWA when both my buddies got same behaviour (massive fps drop, game freeze, complete computer lock). Please, see twitch clip enclosed, in case this is being red by someone who is not from CZE/SK please, let Czech colleagues listen to clip they will understand how this happened.
Both my buddies entered firestation from small rear exit doors, after entering they saw a dead body of player on the floor and both reported thís error more or less at the same time, however, I wasnt affected as standing further from them so I assume it was something specific to that place.
One got to hard reset PC, second one was finally able to kill dayZ. However, after re-start of the game and logging into server they still got the issues, one of them got to near woods lagging "1 frame per 5 seconds" but after getting away from there game got back to normal performance and second one after logging back got only a black screen and he had to restart pc again as it was locked again. Now i asked him to retry after 8 hours and he got this problem no more even at the firestation.
Very rough specs of both PCs:
1) i7-4790k, 16GB DDR3, GTX970, Windows 10 x64
2) i5-4400, 8GB DDR3, GTX960, WIndows 7 x64
Twitch clip link: https://clips.twitch.tv/BoldAbstemiousGuanacoSmoocherZ