To save you some time, upload a copy of your dxdiag and a crashdump from your DayZ AppData folder. You might aswell do it now, since that will be the first thing the feedback team will ask you for.
If you're unsure how to, there's a guide here:
http://forums.dayzgame.com/index.php?/topic/186540-my-dayz-crashed-what-do-i-do/
Copied from the link above:
Getting your DxDiag file:
- Open the Start menu
- Write "dxdiag"
- Press enter
- A window will open
- Click "Save all information"
- You will get a text file - that's what we need
Getting your crash dumps:
- Go to this file location: "C:\Users\<Name>\AppData\Local"
- There you should see a DayZ folder.
- Create a .zip or .rar file of that folder.