Windows 8 Registry Permission to change values

Since Windows-8 I'm unable to change values in the registry (different customizations) like changing the explorer menu.

Anyone able to change the value of the key 'Attributes' in the following folder?

HKEY_CLASSES_ROOT\CLSID\{F02C1A0D-BE21-4350-88B0-7367FC96EF3C}\ShellFolder

Because I get always the following error message - independent of the key I try to change. This is a general problem and "run as Administrator" on regedit.exe does not work either. I also tried to change the permission on the folders in the registry, but no success.

After you have set the Administrators group as Owner of the key, did you grant Full Control to it? Also try granting Full Control to SYSTEM also.

If that doesn't help, download PsExec and try the following command, then see if the edits are allowed:

psexec -i -d -s %windir%\regedit.exe