FYI: I am currently migrating from an old XP box where SixXs worked first time to a new Windows 7 (Home Premium) box. I had great difficulty getting the TAP driver to install, with no useful diagnostics from tapinstall.exe. Solved by finding a very recent OpenVPN (openvpn-2.2.2-install) and installing the TAP driver (and nothing else) from that. All the earlier versions, including the one that the SixXs site pointed to, failed silently. This post brought to you via IPv6, of course ;-)