Microsoft KB Archive/929852

= How to disable certain Internet Protocol version 6 (IPv6) components in Windows Vista =

Article ID: 929852

Article Last Modified on 10/26/2007

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APPLIES TO


 * Windows Vista Enterprise
 * Windows Vista Enterprise 64-bit Edition
 * Windows Vista Home Basic 64-bit Edition
 * Windows Vista Home Premium 64-bit Edition
 * Windows Vista Ultimate 64-bit Edition
 * Windows Vista Business
 * Windows Vista Business 64-bit Edition
 * Windows Vista Home Basic
 * Windows Vista Home Premium
 * Windows Vista Starter
 * Windows Vista Ultimate

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Important This article contains information about how to modify the registry. Make sure that you back up the registry before you modify it. Make sure that you know how to restore the registry if a problem occurs. For more information about how to back up, restore, and modify the registry, click the following article number to view the article in the Microsoft Knowledge Base:

256986 Description of the Microsoft Windows registry



INTRODUCTION
This article describes step-by-step instructions for how to disable certain Microsoft Internet Protocol version 6 (IPv6) components in Windows Vista. To disable IPv6 components, you must be logged on to the Windows Vista computer as a member of the Administrators group, or your user account must be granted permissions to edit the Windows registry.



MORE INFORMATION
Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall the operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.

To disable certain IPv6 components in Windows Vista, follow these steps:  Click Start, type regedit in the Start Search box, and then click regedit.exe in the Programs list. In the User Account Control dialog box, click Continue. In Registry Editor, locate and then click the following registry subkey:

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

 Double-click DisabledComponents to modify the DisabledComponents entry.

Note If the DisabledComponents entry is unavailable, you must create it. To do this, follow these steps:  In the Edit menu, point to New, and then click DWORD (32-bit) Value. Type DisabledComponents, and then press ENTER. Double-click DisabledComponents.</li></ol> </li> Type any one of the following values to configure the IPv6 protocol, and then click OK: <ol style="list-style-type: lower-alpha;"> Type 0 to enable all IPv6 components.

Note The value &quot;0&quot; is the default setting.</li> Type 0xffffffff to disable all IPv6 components, except the IPv6 loopback interface. This value also configures Windows Vista to use Internet Protocol version 4 (IPv4) instead of IPv6 in prefix policies.</li> Type 0x20 to use IPv4 instead of IPv6 in prefix policies.</li> Type 0x10 to disable native IPv6 interfaces.</li> Type 0x01 to disable all tunnel IPv6 interfaces.</li> Type 0x11 to disable all IPv6 interfaces except for the IPv6 loopback interface.</li></ol> </li></ol>

Note You must restart your computer for these changes to take affect.

Note Administrators must create an ADMX file in order to expose the settings in step 5 in a Group Policy setting.

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