Store the state of the explorer toolbar, locked or unlocked, in the proper registry location and set the proper toolbar state when initialized. CORE-9094 - Set `HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Toolbar\Locked` to 1 when the explorer toolbar is locked, 0 when the toolbar is unlocked. - Query `HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Toolbar\Locked` when the toolbar is initialized to set the correct locked state. - Set the default state of the toolbar to locked if the registry key does not exist, matching the behavior of Windows Server 2003.