The Active Desktop accessible via Start/Settings can be disabled. This Windows NT registry hack disables access via Explorer but does not disable the same functionality accessible by right-clicking the desktop. Cut and paste the following script into noactive.reg file and run it.
REGEDIT4 BLANK LINE GOES HERE [HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] "NoSetActiveDesktop"=dword:40 BLANK LINE GOES HERE
See .REG files for background information on .REG files.
The following tweak prevents disabling via desktop properties:
REGEDIT4 BLANK LINE GOES HERE [HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] "ForceActiveDesktopOn"=dword:1 BLANK LINE GOES HERE
Other active desktop values installed via IE, include :
NoFavoritesMenu : Removes the Favorites folder from the Start menu
NoFolderOptions : Removes the Folder Options menu item from the Settings menu
NoRecentDocsHistory : Removes Documents History
NoRecentDocsMenu : Removes the Documents command from the Start menu