For Vista users you may have found that when you run ipconfig from the command prompt you are given an extremely long list of network interfaces. These are actually all IPv6 tunnels. In order to disable these tunnels there is a registry setting that has to be changed. The registry setting is located at:
HKLM>System>CurrentControlSet>Services>Tcpip6>Parameters
Within the parameters key you have to edit a dword called ‘DisabledComponents’. By setting this value to 1 this will disable your IPv6 tunnels and thus clean up your ipconfig results. Its possible that you may not have ‘DisabledComponents’ under the Parameters key in which case you will have to create one