Disable IPv6

 

By Joseph Piggee Sr.

http://support.microsoft.com/kb/929852

IPv6 can be disabled either through the DisabledComponents registry value or through the check box for the Internet Protocol Version 6 (TCP/IPv6) component in the list of items on the Networking tab for the properties of connections in the Network Connections folder. The following figure shows an example.

The DisabledComponents registry key affects all interfaces on the host. However, the check box on the Networking tab affects only the specific interface. The DisabledComponents registry value does not affect the state of the check box. Therefore, even if the DisabledComponents registry key is set to disable IPv6, the check box in the Networking tab for each interface can still be checked. This is expected behavior.

Note Unchecking the checkbox on a network adapter will not disable IPv6 on the host. It will unbind IPv6 from this adapter. To disable IPv6 on the host, follow the steps below.

To use the DisabledComponents registry value to check whether IPv6 was disabled, run the following command at a Windows command prompt: 
reg query HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip6\Parameters /v DisabledComponents

You may receive the following error message: 
ERROR: The system was unable to find the specified registry key or value. 
If you receive this error message, the DisabledComponents registry value is not set. If the DisabledComponents value is set, it overrides the settings in the connection properties. 

To enable or to disable IPv6 or to selectively enable or disable components of IPv6 automatically, click the Fix this problem link. Then, click Runin the File Download dialog box, and follow the steps in this wizard.