PrivateDesk not only let you have multiple virtual desktop. PrivateDesk also let you assign password and HotKey to enter your virtual Private desktop. So if you are in PrivateDesk 1 and you assigned a password to it and you go to Main Desktop or any other Virtual Desktop to avoid other people around you can see what you are doing. if you want to go back to PrivateDesk 1 you must enter the correct password to see and continue working in what you were doing in PrivateDesk 1. this way you can keep your privacy.