Question : Group policy- prevent to save on the desktop

I have applied the GP on the Domain against the desktop. My requirement is that prevent to save any thing on the desktop so I applied the below policy on default domain policy.

Default domain Policy/user Configuration/Desktop/Active Desktop-
Enable Active Desktop-Enable
Prohibit adding items-Enable
Probihit Changes-Enable
Prohibit deleting Items-Enable
Prohibit editing items-Enable

But I am able to create/add/delete folders and files on the desktop. Is there no error is showing so pls consider it and provide the solution.

Answer : Group policy- prevent to save on the desktop

This may be achieved by forcing active desktop and then lock it up :

USER
Administrative Templates\
Desktop\
Active Desktop
=>Enable Active Desktop
=>Prohibit changes
=>Prohibit adding items
=>Prohibit deleting items

I just test it and works.