I'm fairly sure that the TAP driver is installed correctly: "C:\Program Files (x86)\OpenVPN Technologies\OpenVPN Client\core\openvpn" --show-adapters Available TAP-WIN32 adapters [name, GUID]: 'TAP Adapter' {443C9063-3FD4-498A-8D5A-A7578835D871} But then when I run openconnect, it seems to work up to here: ... Connected to HTTPS on xxxxxx.com Please enter your username and password. Username:xxxxxx Password:xxxxxx POST https://xxxxxx.com/+webvpn+/index.html Got CONNECT response: HTTP/1.1 200 OK CSTP connected. DPD 30, Keepalive 20 Microsoft (R) Windows Script Host Version 5.8 Copyright (C) Microsoft Corporation. All rights reserved. No Windows-TAP adapters found. Is the driver installed? Set up tun device failed Any idea what's up?