Windows 8.1 and totally denied access to all users and administrators

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I lost control over one whole disc. I called icacls and denied all access on g: to Everyone. But then – every call of icacls fails with the access denied message. Neither owner nor any administrator is able to repair these rights, the data are lost for Windows. I can just take ownership, but then nothing. I’m astound. There is no superuser like root in Linux? Is it ever possible to rescue such error-states in Win 8.1? Really can I irrecoverably revoke me own rights for ever?

Answer

I’m not able to replicate your problem. I created a 1GB VHD, attached it as drive G:, set permissions on the drive “Everyone -> Deny Full Access”. I get the same “Access Denied” error.

Then I open the Drive’s properties, Security Tab, Advanced…, change Owner to myself. Once the dialog is closed and re-opened (per the message displayed) I can see and change permissions on the drive.