July 14, 2020—KB4558998 (OS Build 17763.1339)

Applies to: Windows 10, version 1809, all editionsWindows Server version 1809Windows Server 2019, all editions

Highlights


  • Updates to improve security when using Internet Explorer and Microsoft Edge Legacy.
  • Updates to improve security when Windows performs basic operations.
  • Updates to improve security when using Microsoft Office products.
  • Updates to improve security when using input devices (such as a mouse, keyboard, or stylus).
  • Improves security in the Microsoft Store.
  • Updates an issue that might prevent some applications from printing documents that contain graphics or large files.

Improvements and fixes


This security update includes quality improvements. Key changes include:

  • Addresses an issue with loading Browser Helper Objects in Microsoft Edge IE mode.
  • Addresses an issue that might cause lsass.exe to fail with the error message, “A critical system process, C:\WINDOWS\system32\lsass.exe, failed with status code c0000008. The machine must now be restarted."
  • Addresses an issue that might prevent some applications from printing documents that contain graphics or large files after installing Windows Updates released June 9, 2020.
  • Security updates to Internet Explorer, the Microsoft Scripting Engine, Windows App Platform and Frameworks, Windows Apps, Microsoft Graphics Component, Windows Input and Composition, Windows Media, Windows Shell, the Microsoft Store, Microsoft Edge Legacy, Windows Cloud Infrastructure, Windows Fundamentals, Windows Management, Windows Kernel, Windows Update Stack, Windows MSXML, Windows File Server and Clustering, Windows Remote Desktop, and the Microsoft JET Database Engine.

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


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 KB4550969 or later, when using Microsoft Edge Legacy, you might receive the error,”0x80704006. Hmmmm…can’t reach this page” when attempting to reach websites on non-standard ports. Any website that uses a port listed in the Fetch Standard specification under bad ports or port blocking might cause this issue.

To mitigate this issue, you can do one of the following:

  • Update to the new, Chromium-based Microsoft Edge and configure it to allow the port used for the affected site. See the note below.
  • Use Internet Explorer 11 to access the website.
  • Update Windows 10 to a newer version.
  • Configure the website to use a standard port on the server side. Don’t use a port that is listed in the Fetch Standard specification under bad ports or port blocking.

Note The new, Chromium-based Microsoft Edge will also fail to connect to websites on non-standard ports by default. This is an expected behavior. However, you can allow sites on the affected non-standard port by using the parameter --explicitly-allowed-ports=####, where #### is the port you require. For example, when you need to access a website on port 6667, type c:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe--explicitly-allowed-ports=6667

We are working on a resolution and will provide an update in an upcoming release.

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 (KB4558997) 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 4558998

Note Some files erroneously have “Not applicable” in the “File version” column of the CSV file. This might lead to false positives or false negatives when using some third-party scan detection tools to validate the build.