XP-SP2 and SP3 Missing Hibernate Selection

I have reinstalled XP-SP2 and updated it with XP-SP3.
I notice that the "Hibernate" selection on shut-down
has disappeared and requires pressing the "shift" key
to activate the hidden control button.

 

The KB-893056 hotfix for SP2 has been integrated into the SP3 install.

The registry edit is not part of the SP3 install.

 

The shut-down options currently show

  - StandBy

  - Restart

  - Shut Down

 

The hot-fix options should show

  - Hibernate

  - StandBy

  - Restart

  - Shut Down


KB-893056 documents a registry edit, but it is not
working on my XP-SP3 machine.  Nothing changes - the
"Hibernate" option is not restored to view.

Registry:

  HKLM/Software/Policies/Microsoft/Windows/System/Shutdown
  ShowHibernateButton (DWORD) = 1

Any additional help would be appreciated.