I'm curious as to how this panned out for the OP. I am having the same issues. I have experienced all of those exact same errors. Weeks of stable gameplay and now I can't start the game without crashing all/most of my system. The DayZ Launcher loads fine, but all hell breaks loose when I click "Play." I have tried running all portions as an administrator. I have tried running the 32-bit version. I have wiped and reinstalled Windows, Steam, DayZ, DirectX, and Nvidia drivers. I checked that all drivers are up to date. I cried a little. All to no avail. I see a lot of similar errors posted around the internet, but I have yet to see a definitive solution.