Accidentally removed own NTFS rights from volume in Windows 7

I am using Windows 7 and my hard drive is partitioned to C: and D: drives. Yesterday I tried to limit some permissions for other users to volume D and accidentally denied everything for group "Users"

Now I can not access the drive even if I am administrator to the local computer. I did not touch the administrator permissions. I can not get to the Security tab of the volume because it says "Access denied".

How can I reset NTFS permissions or get my permissions back? Option is also, if possible, to backup my data to USB drive with some software and format the disk to start over.

I have tried:

• Booting to safe mode
• CMD: takeown /F D: /R
• Changed the drive letter to F: No use and reverted to D.

Thank you for your help!

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