PuTTY freezes on OpenVPN on Windows

Issue: Opening PuTTY no login information are returned and then the connection is closed.

Solution (Windows 7):

1. On the taskbar Right click and then Disconnect the VPN
2. Look for the VPN icon and then Right click on VPN shortcut icon > Properties
3. Select Compatibility tab and then check Run as administrator
4. Launch OpenVPN: a message will be prompted to allow the app to run as administrator