Table of contents
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Release Date:

11/10/2020

Version:

OS Build 17134.1845

NEW 8/5/21
EXPIRATION NOTICE

IMPORTANT As of 8/5/2021, this KB is no longer available from Windows Update, the Microsoft Update Catalog, or other release channels. We recommend that you update your devices to the latest security quality update.

UPDATED 11/10/20
For more information about the various types of Windows updates, such as critical, security, driver, service packs, and so on, please see the following article. To view other notes and messages, see the Windows 10, version 1803 update history home page.

Highlights

  • Updates an issue that might prevent Microsoft Edge from opening or might prevent you from browsing in certain circumstances.

  • Updates to improve security when using Microsoft Office products.

  • Updates to improve security when using input devices such as a mouse, keyboard, or pen.

  • Updates to improve security when Windows performs basic operations.

  • Updates to improve security when using external devices (such as game controllers, printers, and web cameras).

  • Updates the 2020 DST start date for the Fiji Islands to December 20, 2020.

Improvements and fixes

This security update includes quality improvements. Key changes include:

  • Allows administrators to use a Group Policy to enable Save Target As for users in Microsoft Edge IE Mode.

  • Allows you to restrict the JScript Scripting Engine to a process.

  • Addresses an issue that might prevent Microsoft Edge from opening or might prevent you from browsing in certain circumstances.

  • Updates the 2020 DST start date for the Fiji Islands to December 20, 2020.

  • Addresses a security vulnerability by preventing applications that run as a SYSTEM account from printing to local ports that point to a file. Failing print jobs log error 50, “The request is not supported.” in event ID 372 in the PrintService\Admin event log. To address this issue in the future, make sure your applications or services run as a specific user or service account.

  • Security updates to the Microsoft Scripting Engine, Microsoft Graphics Component, Windows Input and Composition, Windows Wallet Service, Windows Fundamentals, Windows Kernel, and Windows Peripherals.

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 new Security Update Guide website.

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 general information about SSUs, see Servicing stack updates and Servicing Stack Updates (SSU): Frequently Asked Questions.

If you are using Windows Update, the latest SSU (KB4580398) 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

Release Channel

Available

Next Step

Windows Update and Microsoft Update

Yes

None. This update will be downloaded and installed automatically from Windows Update.

Microsoft Update Catalog

Yes

To get the standalone package for this update, go to the Microsoft Update Catalog website.

Windows Server Update Services (WSUS)

Yes

This update will automatically sync with WSUS if you configure Products and Classifications as follows:

Product: Windows 10

Classification: Security Updates

 

File information

For a list of the files that are provided in this update, download the file information for cumulative update 4586785

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