Table of contents
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Release Date:

27/07/2021

Version:

OS Build 17763.2091

6/15/21
IMPORTANT 
This release includes the Flash Removal Package. Taking this update will remove Adobe Flash from the machine. For more information, see the Update on Adobe Flash Player End of Support.

5/11/21
REMINDER 
Windows 10, version 1809 reached end of service on May 11, 2021 for devices running the Enterprise, Education, and IoT Enterprise editions. After May 11, 2021, these devices will no longer receive monthly security and quality updates that contain protection from the latest security threats. To continue receiving security and quality updates, Microsoft recommends updating to the latest version of Windows 10.

We will continue to service the following editions: Enterprise G, HoloLens, and the LTSC editions for Client, Server, and IoT.

5/11/21
REMINDER
Microsoft removed the Microsoft Edge Legacy desktop application that is out of support in April 2021. In the May 11, 2021 release, we installed the new Microsoft Edge. For more information, see New Microsoft Edge to replace Microsoft Edge Legacy with April’s Windows 10 Update Tuesday release.

11/17/20
For information about Windows update terminology, see the article about the types of Windows updates and the monthly quality update types. To view other notes and messages, see the Windows 10, version 1809 update history home page.

Highlights

  • Updates an issue that might prevent printers, scanners, and multifunction devices from working. This issue occurs on devices that do not comply with a certain specification and use smart card authentication.

Improvements and fixes

This non-security update includes quality improvements. Key changes include:

  • Temporarily addresses an issue with devices that do not comply with section 3.2.1 of the RFC 4556 specification, which is required for CVE-2021-33764. Noncompliant printers, scanners, and multifunction devices might not work when you use smart card authentication (PIV). You must enable this temporary mitigation using a registry key. Otherwise, this issue will occur after you install the July 13, 2021 or later update on domain controllers (DC) in your environment.

    Important You must have your noncompliant devices updated and compliant or replaced by February 8, 2022. After that, the mitigation will not work in security updates. For more information, see KB5005408.

If you installed earlier updates, only the new fixes contained in this package will be downloaded and installed on your device.

Windows Update Improvements

Microsoft has released an update directly to the Windows Update client to improve reliability. Any device running Windows 10 configured to receive updates automatically from Windows Update, including Enterprise and Pro editions, will be offered the latest Windows 10 feature update based on device compatibility and Windows Update for Business deferral policy. This doesn't apply to long-term servicing editions.

Known issues in this update

Symptom

Workaround

After installing KB4493509, devices with some Asian language packs installed may receive the error, "0x800f0982 - PSFX_E_MATCHING_COMPONENT_NOT_FOUND."

  1. Uninstall and reinstall any recently added language packs. For instructions, see Manage the input and display language settings in Windows 10.

  2. Select Check for Updates and install the April 2019 Cumulative Update. For instructions, see Update Windows 10.

Note If reinstalling the language pack does not mitigate the issue, reset your PC as follows:

  1. Go to the Settings app > Recovery.

  2. Select Get Started under the Reset this PC recovery option.

  3. Select Keep my Files.

Microsoft is working on a resolution and will provide an update in an upcoming release.

After installing KB5001342 or later, the Cluster Service might fail to start because a Cluster Network Driver is not found.

This issue occurs because of an update to the PnP class drivers used by this service.  After about 20 minutes, you should be able to restart your device and not encounter this issue.
For more information about the specific errors, cause, and workaround for this issue, please see KB5003571.

How to get this update

Before installing this update

Prerequisite:

You must install the May 11, 2021 servicing stack update (SSU) (KB5003243) or the latest SSU (KB5003711) 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 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

No

See the other options below.

Windows Update for Business

No

See the other options below.

Microsoft Update Catalog

Yes

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

Windows Server Update Services (WSUS)

No

See the other options above.

File information

For a list of the files that are provided in this update, download the file information for cumulative update 5005394.

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