If you have access to another machine you can create Win 10 install media after reading
https://www.microsoft.com/en-us/software-download/windows10You will need an USB of at least 8GB.
You will need to boot up with that, navigate to the Install screen and select Repair your computer.
This will give you similar Troubleshoot and Command Prompt options where you would then enter the same cmds.
The partition letter will be different in this case.
When done, remove the USB and reboot.
Open Windows/File Explorer - This PC - insert the USB and double click on its drive.
This will open to its files where you then double click on setup Application.
This will perform a repair install which won't affect installed programs or personal files but should sort your Permissions.
You could then see how Windows Repair runs.