No clue what we’re talking about?
Now you’ll want to pretty much ignore everything in here, and choose the Advanced button.
Make absolutely certain you’ve checked that box before you click Apply!
Make absolutely certain you select that checkbox before clicking Apply!
You’ll be prompted by Windows, asking if you really want to proceed.
And now, you should be able to rename or delete any of the keys.
I would advise making a backup by right-clicking on DesktopBackground and choosing to export into a reghack file.
Combined with removing theATI Catalyst item from the menu, we now have a nice, clean desktop menu.