The portable version has some limitations. it doesn't save any settings upon exit, doesn't run as a service, so you won't be able to auto connect with your TeamViewer account, run at windows logon screen or have a permanent password. Because of these reasons, I invested some time figuring out a way to install the original full version silently. Tested on Windows XP/7. works Link for TeamViewer Silent Installer (repacked): TeamViewer Silent Setup [Generated by TGUP - Create Silent Installers method]