I recently installed Windows 7 on my system and had problem with Open VPN gui. When I tried installing OpenVPN in Windows 7 I got a message “TAP driver is unsigned, and this version of Windows ONLY supports signed drivers.”
Anyway, here’s a fix.
(1) If installed Open VPN- then uninstall the current copy of OpenVPN.
(2) Download the installer from here:
http://openvpn.net/release/openvpn-2.1_rc15-install.exe(3) Rt-Click Installer-->Properties-->Compatibility
Choose the option “Run this program in compatibility mode for: - Windows Vista”
(4) Set the Privilege Level: --Run this program as an administrator
(5) Click Ok
(6) Run the installer
I am sure this will help you out.