September 11, 2018—KB4457128 (OS Build 17134.285)

NoteThis release also contains updates for Microsoft HoloLens (OS Build 17134.285) released September 11, 2018.

Improvements and fixes

This update includes quality improvements. No new operating system features are being introduced in this update. Key changes include:

• Provides protection against a Spectre Variant 2 vulnerability (CVE-2017-5715) for ARM64 devices.
• Addresses an issue that causes the Program Compatibility Assistant (PCA) service to have excessive CPU usage. This occurs when the concurrency of two simultaneous add and remove programs (ARP) monitoring threads is not handled correctly.
• Security updates to Internet Explorer, Microsoft Edge, Microsoft scripting engine, Microsoft Graphics Component, Windows media, Windows Shell, Windows Hyper-V, Windows datacenter networking, Windows virtualization and kernel, Windows Linux, Windows kernel, Microsoft JET Database Engine, Windows MSXML, and Windows Server.
  If you installed earlier updates, only the new fixes in this package will be downloaded and installed on your device.For more information about the resolved security vulnerabilities, see the Security Update Guide.

Known issues in this update

How to get this update

This update will be downloaded and installed automatically from Windows Update. To get the standalone package for this update, go to the Microsoft Update Catalog website.ImportantWhen installing the servicing stack update (SSU) KB4456655and the latest cumulative update (LCU) (KB4457128) from the Microsoft Update Catalog, install the SSU first to mitigate potential issues while installing the LCU.File informationFor a list of files provided in this update, download thefile information for cumulative update 4457128.