Hello.
What is the english translation of that error?

Windows could not access The specified device,path,or file. You may not have The necessary permissions to access The item.

Thank you.
Can you please check all the suggestions mentioned here? https://www.reddit.com/r/dayz/comments/1lqaaja/windows_cannot_access_the_specified_device_path/

I watched and tried every single video on the internet, but none of them worked. Now, this warning has appeared.I have not used any cheat programs whatsoever.I think I've been banned from the game now.Nothing else comes to mind.If something like that happened, I was treated unfairly, because I neither cheated nor used the program.

No. This is not a ban but a game crash.
Please upload all the files mentioned in the report to this ticket - ideally in zip or rar archive.