I have a new laptop, running Windows 8.1 Pro. I am trying to set up an L2TP/IPSEC vpn to my office.
I have created the connection, and filled in the various settings including PSK, but whenever I try and connect it fails with Error 789. I have checked this against my Windows XP / Vista / 7 laptops (which all work fine), and the VPN setup details are all identical. It works fine on all the other laptops, but not on Windows 8.1.
Is there something special about Windows 8.1 that would prevent this from working?