Thanks. I think I'm going to go ahead and use the Shrew Soft VPN client.

Have you installed the VPN client after upgrading to Windows 10? I have to have the VPN so if it simply doesn't work with Windows 10 I'm stuck on 8.1 :(

I have the Cisco VPN client installed and I'm having the same issue. No network adapters listed. They do appear under Device manager but not in the control panel. I need the VPN client though so...