if you want to disable right click at desktop, there is a simple registry tweak which can restrict the user to use right clicks. This tweak works on desktop and explorer only.

To disable right click, Go to Start > Run and type REGEDIT and hit Enter. It will open the registry editor.

Find this entry in the registry editor and
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer

Right click at the empty area on the right column and New > DWORD Value. Use name NoViewContextMenu, then double click on it and set the value data as 1. This tweak will disable right click for all users but if you want to do it for specific user, do the same tweak for HKEY_CURRENT_USER.