[ important excerpt from "http://openvpn.se/development.html" ]


This installation package also configures OpenVPN GUI to run in
"Service only" mode.


Use the new --win32-gui option to enable the passphrase dialog. You must
also give your non-admin users the right to start and stop the openvpn
service with subinacl.exe. See this HowTo for more info on that.

Note: This solution has some notable drawbacks compared to the normal
OpenVPN / OpenVPN GUI operation, so only use it if you really must not
run as a user with admin rights. Drawbacks:

    * OpenVPN GUI can't get the log output from OpenVPN so it will
      report connected immediately without knowing if OpenVPN has
      actually established the tunnel or not.
    * If you have multiple configs all will be started and stopped at
      the same time.
    * Proxy settings can't be done from the GUI.