OpenVPN for Windows 7

If you want to silently install OpenVPN on Windows 7, there are some extra steps you have to take.

To be able to do a silent install of OpenVPN, you first have to install or inject the ‘TAP-Windows Provider Network Adapers Certificate’.
You can obtain this certificate on a Windows 7 machine where OpenVPN is installed.

Follow this method.

Exporting the certificate:

1. Install OpenVPN on a test-machine or VM.
2. Start certmgr.msc
3. Locate the OpenVPN certificate in the ‘Trusted Publishers’ –> ‘Certificates’ section.
4. Double-click the ‘OpenVPN’ certificate.
5. Click the ‘Details’ tab.
6. Click ‘Copy to file’.
7. Accept the Wizard defaults and choose a location and filename for the certificate.
8. Copy the .cer file to a save place outside the test-machine.
   

Importing the certificate:

1. On the machine or image where you want the certificate installed, open an elevated command prompt.
2. Type: certutil -addstore TrustedPublisher [drive][path][certificate] ( E.g: certutil -addstore TrustedPublisher c:\test\openvpn.cer)
3. You will see a message when the certificate is successfully installed.

You can now do a silent install of OpenVPN.