December 10, 2019—KB4530717 (OS Build 17134.1184)

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 Windows performs basic operations.
• Updates to improve security when using external devices (such as game controllers and web cameras).
• Updates an issue in which the Microsoft Store might fail to open on Windows on Arm.

Improvements and fixes

This security update includes quality improvements. Key changes include:

• Addresses an issue in which the Microsoft Store might fail to open on Windows on Arm.
• Changes the default behavior in ASP.NET for the SameSite cookie header to align with changes other industry partners are making. For more information, see Work with SameSite cookies in ASP.NET.
• Security updates to Windows Virtualization, Windows Kernel, Windows Peripherals, the Microsoft Scripting Engine, and Windows Server .
  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

• Perform the operation from a process that has administrator privilege.
• Perform the operation from a node that doesn’t have CSV ownership.
  Microsoft is working on a resolution and will provide an update in an upcoming release.
  When setting up a new Windows device during the Out of Box Experience (OOBE), you might be unable to create a local user when using Input Method Editor (IME). This issue might affect you if you are using the IME for Chinese, Japanese, or Korean languages.Note This issue does not affect using a Microsoft Account during OOBE.| This issue is resolved in KB4534308.
  After installing this update, you might encounter issues with applications that use embedded HTML and SameSite cookies across sites or iframes.| To align with industry partners, the default behavior of the SameSite cookie header in ASP.NET has been changed. To mitigate this issue, see Work with SameSite cookies in ASP.NET.

How to get this update