RM> Where is the IPv6 address coming from when your router does not have RM> any?? Maybe M$ Win uses one of those brain damaged protocols like RM> Teredo?
According to whois.arin.net, the above 2001: address resolves to 6RD from AT&T.
RM> Can you ping ipv6.google.com from the win7 box. RM> Are you sure that your provider provides IPv6?
Yes via a 6RD tunnel is my guess.
RM> Maybe the others have a better clue what is going on ... i am baffled.