Important Internet Protocol version 6 (IPv6) is a mandatory part of Windows Vista and later versions of Windows. We do not recommend that you disable IPv6 or its components. If you do, some Windows components may not function. Additionally, system startup will be delayed for 5 seconds if IPv6 is disabled by incorrectly, setting the DisabledComponents registry setting to a value of 0xfffffff. The correct value should be 0xff. For more information, see the "What are Microsoft's recommendations about disabling IPv6?" question in IPv6 for Microsoft Windows: Frequently Asked Questions.
Click the Download button for the procedure that you want to run. Then, click Run or Open in the File Download dialog box, and then follow the steps in the easy fix wizard.
|Disable IPv6||Prefer IPv4 over IPv6 in prefix policies||Disable IPv6 on all nontunnel interfaces||Disable IPv6 on all tunnel interfaces||Disable IPv6 on nontunnel interfaces (except the loopback) and on IPv6 tunnel interface|
|Re-enable IPv6||Prefer IPv6 over IPv4 in prefix policies||Re-enable IPv6 on all nontunnel interfaces||Re-enable IPv6 on all tunnel interfaces||Re-enable IPv6 on nontunnel interfaces and on IPv6 tunnel interfaces|
See KB3014406 if you encounter startup delay after you disable IPv6 in Windows 7 SP1 or Windows Server 2008 R2 SP1.
By default, the 6to4 tunneling protocol is enabled in Windows 7, Windows Vista, Windows Server 2008 R2, and Windows Server 2008 when an interface is assigned a public IPv4 address (that is, an IPv4 address that is not in the ranges 10.0.0.0/8, 172.16.0.0/12, or 192.168.0.0/16). 6to4 automatically assigns an IPv6 address to the 6to4 tunneling interface for each such address that is assigned, and 6to4 will dynamically register these IPv6 addresses on the assigned DNS server. If this behavior is not desired, we recommend that you disable IPv6 tunnel interfaces on the affected hosts.
Article ID: 929852 - Last Review: Apr 10, 2017 - Revision: 2
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