I somehow found that the point is c:\windows\system32\sethc.exe should be a copy of cmd.exe in the same directory. If so, why we need to use the repair mode? Especially if you can not enter repair mode? We can use linux base os and mount the ntfs and manipulate the files. It worked well.

1. I used partition magic. It is very easy to work with partition manipulation; find a proper disk and partition and mount it and manipulate files.
2. After manipulation of the files, restart PC. And the same thing as the 1st one. You can review it here.
3. Just do from the shift button x 5.
4. Somehow user name was not Admin, but one of the listed one by "Net user".

If you don't have Partition Magic. Use Universal USB installer. It can help you install the linux distribution on a USB stick.