In this video I am installing the XCA certificate authority application to manage certificates for an OpenVPN server, with me then alshowing how to use the subsequent certificates on a Windows 10 machine acting as a client.

Enable IP Routing in Windows 10

Click on the start button and type "regedit" without the quotes and press enter. Say yes to the UAC prompt and then go to the:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters

key in Regedit and then find the subkey called IPEnableRouter and change it's value from 0 to 1. Then click on the start button again and type "services.msc" and then find the "Routing and Remote Access" service, which you should then enable and start.