May 12, 2020—KB4556807 (OS Build 17134.1488)

IMPORTANTWe have been evaluating the public health situation, and we understand this is impacting our customers. In response to these challenges, we are prioritizing our focus on security updates. Starting in May 2020, we are pausing all optional non-security releases (C and D updates) for all the supported versions of Windows client and server products (Windows 10, version 1909 down to Windows Server 2008 SP2).There is no change to the monthly security updates (B release – Update Tuesday); these will continue as planned to ensure business continuity and to keep our customers protected and productive.

Windows 10, version 1803 (the April 2018 Update) Home and Pro editions have reached end of service. For Windows 10 devices that are at, or within several months of reaching end of service, Windows Update will automatically initiate a feature update (with users having the ability to choose a convenient time). This keeps those devices supported and receiving the monthly updates that are critical to device security and ecosystem health.

Highlights

• Updates to improve security when using Internet Explorer and Microsoft Edge.
• Updates to improve security when using input devices such as a mouse, keyboard, or stylus.
• Updates to improve security when using Microsoft Xbox.
• Updates to improve security when Windows performs basic operations.
• Updates for storing and managing files.

Improvements and fixes

This security update includes quality improvements. Key changes include:

• Updates the 2020 start date for daylight saving time (DST) in the Kingdom of Morocco.
• Addresses an issue that prevents a call to NCryptGetProperty() from returning the correctpbOutputvalue whenpszProperty is set to “Algorithm Group” and you are using a Trusted Platform Module (TPM) 1.2 device.
• Security updates to Internet Explorer, the Microsoft Scripting Engine, Windows App Platform and Frameworks, Windows Input and Composition, Windows Media, Windows Shell, Microsoft Xbox, Microsoft Edge, Windows Fundamentals, Windows Cryptography, Windows Kernel, Windows Linux, Windows Update Stack, Windows Core Networking, Internet Information Services, Windows Network Security and Containers, Windows Active Directory, Windows Storage and Filesystems, 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