Running ipconfig /all shows a Teredo Tunneling Pseudo-Interface. What is that? Does this have something to do with IPv4 vs IPv6? Should I get rid of it? If so how?
Is to do with IPv6
All the gory details here: http://www.microsoft.com/technet/network/ipv6/teredo.mspx
Some people have had issues with it, and disabled it, but as a general rule, if it aint broke...