Download of OpenVPNPortable_1.8.2.paf.exe (OpenVPNPortable_1.8.2.paf.exe ( external link: SF.net): 653,778 bytes) will begin shortly. If not so, click link on the left.
OpenVPN Portable is openvpn and a modification of openvpn-gui, packaged with a PortableApps.com Launcher as a portable app, so you can take your vpn connection always with you.
Unfortunately openvpn needs to install a network driver. This needs admin rights. OpenVPN Portable checks during the start process if the driver is installed. If not, the application asks for admin rights and installs it automatically.