I played Dayz without any problems until yesterday when I returned home and started running the game I noticed that the game after launch has the status "not responding" and no logos or main screen (menu) appear.
After about 20 seconds of looking at a black screen my computer completely froze! And I had to turn off the power.
I tried a couple more times to run Dayz but all to no avail.

I also tried deleting the game / deleting BattleEye / installing new drivers / Cleaning files.

I have never had such problems before, can I somehow solve it?

I solved it.

1. You need someone else, for instance a friend.
2. Let your friend log onto your steam account.
3. Let your friend start DayZ.
4. Let your friend close DayZ and log off from steam again.
5. You log back into your own account and you should be able to launch it and play again!