MS16-066: Security update to virtual secure mode: May 10, 2016

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.

Method 2: Microsoft Download Center

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

Security update deployment information

Windows 10 (all editions)

Reference table

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

Security update file nameFor 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 switchesSee Microsoft Knowledge Base Article 934307
Restart requirementA system restart is required after you apply this security update.
Removal informationTo 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 informationSee Microsoft Knowledge Base Article 3156387
See Microsoft Knowledge Base Article 3156421
Registry key verificationNote There is no registry key to validate the presence of this update.

How to obtain help and support for this security 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
malicious attacker exploit
Properties

Article ID: 3155451 - Last Review: 05/10/2016 17:02:00 - Revision: 1.0

Windows 10, Windows 10 Version 1511, Windows Server 2012 R2 Datacenter, Windows Server 2012 R2 Standard, Windows Server 2012 R2 Essentials, Windows Server 2012 R2 Foundation

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