Just purchased 9 new Lenovo M93z all-in-ones. Have set up 7 of them and I'm having a problem with one that won't allow users to right click on desktop. On a windows domain network and users should be able to login on any pc. Logins work for everyone but on this one pc, half the users cannot right click on anything on taskbar or any icons. All users have same network rights and are NOT set up as users on pcs. Pc has been restored to factory default (Win 8.0) and done all updates and then update to 8.1 4x now.