IPv6 Improvements in Windows Vista
http://www.usipv6.com/6sense/2006/apr/01.htm

By Joseph Davies
Technical Writer, Windows Networking and Device Technologies
Microsoft Corporation

IPv6 is supported in Microsoft® Windows XP and Windows Server™ 2003, but its use among networking services and applications is limited. With Windows Vista™ (in beta testing at the time of the publication of this article), IPv6 support is installed by default and built-in Windows Vista network services and applications are now IPv6-capable. This new level of IPv6 support in Windows Vista has the potential of igniting the networking industry with new applications and connectivity in the same way as the inclusion of a TCP/IP stack in Windows 95 ignited the industry for the applications and services of the Internet.