I've got Windows 8 and trying to restrict access to a particular folder on my D: drive for other user accounts, and set permissions for the authenticated user group in security tab as denied. Now I can't open it through my standard account and the administrator account as well. Please help.
To recover security settings, you have to become owner of the folder:
When you reopen the folder properties dialog, you'll be able to edit security settings and grant access to yourself.