Manual Procedure:
1. Click [Start] [Run] type [REGEDIT]
2. Navigate to the key HKEY_CURRENT_USER\Software\Microsoft\Internet
Explorer\MenuExt.
Each subkey of this key represents one menu item. Many will include an
ampersand (&) to define the underlined key associated with the command.
Highlight the key you want to delete (for example,
HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\MenuExt\Zoom &In).
Choose Export from the Registry menu and export that branch to a file.
Now delete the key.