Install X.509 SSL Certificates for SSTP VPN

In this guide I will show you how to install X.509 SSL encryption certificates so you can connect to a VPN using the SSTP Protocol.

If you are trying to connect to a VPN using SSTP and keep getting Error 0x800B0109 on Windows XP/Vista/7 or "Error: A certificate chain processed, but terminated in a root certificate which is not trusted by the trust provider" error on Windows 8.1/10, this is because you need to install X.509 SSL encryption certificate(s) for the server(s) you're connecting to. These should be available from your VPN service providers website in the form of vpn.myvpn.crt Certificate files. Once you have them, continue this guide to install.

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