Hide all items on desktop

In regedit :

“HK_C_USER\software\microsoft\windows\currentversi o n\policies\explorer\”
and
“HK_L_M\software\microsoft\windows\currentversion\ p olicies\explorer\”

create a new DWORD “NoDesktop” and change its value to “1″

You can show all the items in the desktop by chaning the value to “0″