Startup delay occurs after you disable IPv6 in Windows

Applies to: Windows Server 2012 R2 DatacenterWindows Server 2012 R2 StandardWindows Server 2012 R2 Essentials More

Symptoms


You may experience an additional five seconds delay during the startup of Windows 8.1, Windows Server 2012 R2, Windows 7 Service Pack 1 (SP1) or Windows Server 2008 R2 SP1.

Cause


This issue occurs because the code to avoid waiting for IPv6 to register with the network stack is not recognized correctly when IPv6 is manually disabled.

How to obtain this update or hotfix


To resolve this issue, we have released an update for Windows 7 or Windows Server 2008 R2. We also have released a hotfix for Windows 8.1 or Windows Server 2012 R2. Before you install this update or hotfix, check the Prerequisites section in this article.

Method 1: Windows Update

This update is available from Windows Update.

Method 2: Microsoft Download Center

The following files are available for download from the Microsoft Download Center:
Operating systemUpdate
All supported x86-based versions of Windows 7Download Download the package now.
All supported x64-based versions of Windows 7Download Download the package now.
All supported x64-based versions of Windows Server 2008 R2Download Download the package now.
All supported IA-64-based versions of Windows Server 2008 R2Download Download the package now.

For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:
119591 How to obtain Microsoft support files from online services
Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file.

Method 3: Hotfix package for Windows Server 2012 R2 and Windows 8.1 

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem.

If the hotfix is available for download, there is a "Hotfix Download Available" section at the top of this Knowledge Base article. If this section does not appear, submit a request to Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft website: Note The "Hotfix Download Available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Update or hotfix detail information


Prerequisites

To install this update or hotfix, you must have April 2014 update rollup for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 (2919355) installed in Windows 8.1 or Windows Server 2012 R2. Or, install Service Pack 1 for Windows 7 or Windows Server 2008 R2.

Registry information

To apply this update or hotfix, you do not have to make any changes to the registry.

Restart requirement

You may have to restart the computer after you apply this update or hotfix.

Update or hotfix replacement information

This update or hotfix does not replace a previously released update or hotfix.

More Information


See How to disable IPv6 to understand the DisabledComponents registry entry.

References


See the terminology that Microsoft uses to describe software updates.