November 12, 2019—KB4525245 (OS Build 15063.2172)

Highlights

• Updates to improve security when using Internet Explorer and Microsoft Edge.

• Updates to improve security when using external devices (such as game controllers, printers, and web cameras) and input devices such as a mouse, keyboard, or stylus.

• Updates to improve security when using Microsoft Office products.

Improvements and fixes

This security update includes quality improvements. Key changes include:

• Addresses an issue that prevents the BitLocker recovery key from being successfully backed up to Azure Active Directory.

• Addresses an issue that causes events that are based on Windows Defender Application Control Code Integrity to be unreadable.

• Provides protections against the Intel® Processor Machine Check Error vulnerability (CVE-2018-12207). Use the registry setting as described in the Guidance KB article. (This registry setting is disabled by default.)

• Provides protections against the Intel® Transactional Synchronization Extensions (Intel® TSX) Transaction Asynchronous Abort vulnerability (CVE-2019-11135). Use the registry settings as described in the Windows Client article. (These registry settings are enabled by default for Windows Client OS editions.)

• Security updates to Microsoft Scripting Engine, Internet Explorer, Windows App Platform and Frameworks, Microsoft Graphics Component, Windows Input and Composition, Microsoft Edge, Windows Fundamentals, Windows Cryptography, Windows Virtualization, Windows Kernel, Windows Datacenter Networking, Windows Peripherals, and the Microsoft JET Database Engine.

If you installed earlier updates, only the new fixes contained in this package will be downloaded and installed on your device.

For more information about the resolved security vulnerabilities, please refer to the Security Update Guide.

Known issues in this update

Microsoft is not currently aware of any issues with this update.

How to get this update

Before installing this update

Microsoft strongly recommends you install the latest servicing stack update (SSU) for your operating system before installing the latest cumulative update (LCU). SSUs improve the reliability of the update process to mitigate potential issues while installing the LCU and applying Microsoft security fixes. For more information, see Servicing stack updates. 

If you are using Windows Update, the latest SSU (KB4523201) will be offered to you automatically. To get the standalone package for the latest SSU, search for it in the Microsoft Update Catalog. 

Install this update

File information

For a list of the files that are provided in this update, download the file information for cumulative update 4525245.