This tweak removes the context menu that would normally appear when the user right clicks on the desktop or in the Explorer right results pane.

Open your registry and find the key below.

Create a new DWORD value, or modify the existing value called 'NoViewContextMenu' using the settings below.

Exit your registry, you may need to restart or log out of Windows for the change to take effect.

Settings:
User Key: [HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\
Explorer]
System Key: [HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\
Explorer]
Name: NoViewContextMenu
Type: REG_DWORD (DWORD Value)
Value: (0 = disabled, 1 = enabled) Disable the Ability to Right Click on the Desktop (All Windows)