Thats right....
Go to RUN type Regedt32
Then go to HKLM\System\CurrentControlSet\Enum
With the ENUM KEY HIGHLIGHTED
Click SECURITY menu that appears in the toolbar, then PERMISSIONS.
(In XP you right click the key and choose permissions)
You may have to ADD the group for the profile that can't see the device manager/printers/network
contents.
Give this group READ ONLY permission and then give SYSTEM full control.
In some instances, you will need to go to ADVANCED and check reset permissions on
all child objects.
Click yes in the warning window and reboot.