The How to disable IP version 6 (IPv6) or its specific components in Windows 7, in Windows Vista, in Windows Server 2008 R2, and in Windows Server 2008 Knowledge Base article has been updated with the following:
These changes address frequently asked questions about disabling IPv6 (such as: If you recommend against it, why is there a KB article that describes how to do it?) and customer confusion about the behavior of the properties of a network interface and the DisabledComponents registry value.
Enjoy!
Joe DaviesPrincipal WriterWindows Server Information Experience