Installing OpenVPN on Windows7

To install, the application has to be run in Vista Compatibility mode.

Download OpenVPN 2.1 and then :

1) After downloading, right-click on the file and select 'properties' then 'compatibility mode'
2) Select 'Windows Vista (Service Pack 1)'
3) For privilege level, select 'Run this program as administrator'
4) Click 'Apply' and then 'OK' to exit
5) Double-click on the installation file install. Agree to any questions that pop up. Click next where prompted.
Note: The installation of the TAP adapter can sometimes take up to a minute. Do not exit the installer while the TAP adapter is being processed.

Once the program is installed you need to mark OpenVPN-GUI in compatibility mode with Vista(SP1) and then mark checkbox "Run As an Administrator".