Update KB4517389 (Build 18362.418) for Windows 10, Version 1903

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Microsoft has released cumulative update KB4517389 (OS Build 18362.418) for the Windows 10 May 2019 Update (version 1903) and Windows Server 2019 (1903). How to download and install a new assembly

October 8 – Comss.ru, Operating Systems. Cumulative update package KB4517389 is for Windows 10 version 1903 (May 2019 Update) based on x86, x64 (amd64), ARM64, and Windows Server 2019 (1903) processors for x64-based systems. The update is available as part of Tuesday’s patch.

Installation through Windows Update

Cumulative Update 4517389 for PC is installed automatically through Windows Update. To check, go to the menu Options > Update and Security and press Check for Updates.

To complete the installation, you will need to restart your computer. After the upgrade, the build number of Windows 10 will change to 18362.418.

To complete the installation, you will need to restart your computer. After the upgrade, the build number of Windows 10 will change to 18362.418.

Install and configure Windows 10 updates

Download update KB4517389

You can also download the update from the Microsoft Update Catalog and install it manually from the link below:

Download KB4517389

Note. Security installation KB4521863 is also available for installation – service stack update (What is the “Servicing stack update”?), Which must be installed before receiving KB4517389.

Improvements and bug fixes KB4517389 (Build 18362.418)

This update includes quality updates. New system features are not presented. List key changes:

Summary of Changes:

  • Security improvements introduced using Internet Explorer and Microsoft Edge.
  • Updated username and password verification process.
  • Updated file saving and managing processes.

Improvements and bug fixes

  • The security vulnerability CVE-2019-1318 was fixed, which could lead to increased delays and increased processor load on client and server computers that do not support Extended Master Secret (EMS) RFC 7627. The problem manifested itself during the TLS Handshake procedure (negotiating TLS connection [Transport Layer Security]) with devices and servers that do not support EMS. EMS support is available on all supported versions of Windows, starting from 2015. The technology will be forcibly introduced with the release of updates of October 8 and subsequent monthly updates.
  • Fixed a problem with applications and printer drivers that use the Windows JavaScript engine (jscript.dll) for processing print jobs.
  • Security Updates for Windows Shell, Internet Explorer, Microsoft Edge, Windows App Platform and Frameworks, Windows Cryptographic Systems, Windows Authentication Systems, Windows Storage and File Systems, Windows Kernels, Microsoft Scripting Engine and Windows Server.

If you installed previous updates, this time only new changes in the composition of the rollup package will be applied.


You can download the file below:

x64 download update
x86 download update
ARM64 download update
Windows Server 2019 download update