Summary

This security update resolves a vulnerability in Microsoft Windows. The vulnerability could allow a security feature bypass if an attacker runs a specially crafted application to bypass code integrity protections in Windows.



To learn more about the vulnerability, see Microsoft Security Bulletin MS16-066.

More Information

Important

  • If you install a language pack after you install this update, you must reinstall this update. Therefore, we recommend that you install any language packs that you need before you install this update. For more information, see Add language packs to Windows.

How to obtain and install the update

Method 1: Windows Update

This update is available through Windows Update. When you turn on automatic updating, this update will be downloaded and installed automatically. For more information about how to turn on automatic updating, see
Get security updates automatically.

You can obtain the stand-alone update package through the Microsoft Download Center. Follow the installation instructions on the download page to install the update.

Click the download link in Microsoft Security Bulletin MS16-066 that corresponds to the version of Windows that you are running.

More Information

Windows 10 (all editions)Reference table

The following table contains the security update information for this software.


Security update file name

For all supported 32-bit editions of Windows 10:
Windows10.0-KB3156387-x86.msu


For all supported x64-based editions of Windows 10:
Windows10.0-KB3156387-x64.msu


For all supported 32-bit editions of Windows 10 Version 1511:
Windows10.0-KB3156421-x86.msu


For all supported x64-based editions of Windows 10 Version 1511:
Windows10.0-KB3156421-x64.msu

Installation switches

See Microsoft Knowledge Base Article 934307

Restart requirement

A system restart is required after you apply this security update.

Removal information

To uninstall an update installed by WUSA, use the /Uninstall setup switch or click Control Panel, click System and Security, click Windows Update, click Installed updates under See also, and then select from the list of updates.

File information

See Microsoft Knowledge Base Article 3156387
See Microsoft Knowledge Base Article 3156421

Registry key verification

Note There is no registry key to validate the presence of this update.


Help for installing updates: Support for Microsoft Update

Security solutions for IT professionals: TechNet Security Troubleshooting and Support

Help for protecting your Windows-based computer from viruses and malware: Virus Solution and Security Center

Local support according to your country: International Support

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