How to disable IPv6 in Windows Vista

Disabling IPv6 in Windows Vista could be done using one of the following methods. Both methods will disable IPv6 on all networks adapters, excluding IPv6 loopback interface (excluding tunnel as well if you follow the first approach).

Go to the Network Connections section, right-click network adapter, select Properties and clear Internet Protocol Version 6 (TCP/IPv6) check box. Do it for all network adapters available.

Another way to disable IPv6 is by using regedit. Add the following entry (DWORD) set to 0xFFFFFFFF:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip6\Parameters\DisabledComponents

Make sure to restart the PC after you finished with regedit.

Finally, according to IPv6 for Microsoft Windows: FAQ:

If you disable IPv6, you will not be able to use Windows Meeting Space or any application that relies on the Windows Peer-to-Peer Networking platform or the Teredo transition technology.

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