Disable right click on Desktop:

User Key: [HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\

Explorer]

System Key: [HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\

Explorer]

Value Name: NoViewContextMenu

Data Type: REG_DWORD (DWORD Value)

Value Data: (0 = disabled, 1 = enabled)