I am Administrator. Also the "big" administrator net user Administrator /active. But I have no access to my own files.
First let me say what I've done: I copied some files from one computer over LAN to the other. The I found out, that this computer has no access to a few (about 25 files), I've modified in editor. As solution I wanted to "remove the permission for EVERYONE" and add it again.
But while removing I had to confirm that I now lose permission to files as "warning". And now, because folder is 19GB, I canceled all. But it does not cancel really because half of the folders are already without permission. Now I wanted to add "EVERYONE" to the user list but have no permission to some folders and files > Error "Permission denied". And I also cannot remove this user "EVERYONE" because Windows means it is content of a container folder. I cannot do anything anymore. Also tried to copy files from A to B but have no access anymore. But I am the Administrator and also the super Administrator. 10minutes before I've worked with all files. Only had no permission for about 25 from other computer. Now I have no permission for about 20,000 files on my own computer.
* EDIT > SOLUTION *
Needed to set the hook to "inherit from containers". Then Windows asks to "owerwrite" all permissions. That seems to work.