KB4571756 – Windows 10 version 2004 Build 19041.508

Sept 2020 security updates are now available at the Microsoft Update Catalog for all Windows 10 versions. The company had recently introduced several bug fixes on Windows 10 version 2004 through a non-security patch. Now, installing the KB4571756 cumulative update will correct any security-related concerns on the computer. 

As usual, the operating system will detect this patch automatically. If you haven’t restricted the Windows update section via any means, KB4571756 gets downloaded and installed on the computer. Once over, there appears a notification prompting to restart the device. Hit the same and enjoy the upgraded 20H1 version. 

KB4571756 - download

Latest: Microsoft announced Windows 10 Build 19042.508 (20H2)

Windows 10 2004 Sept Security Patch KB4571756 

The KB4571756 security update brings some quality improvements and they are as follows –

  • Resolves an issue with a possible elevation of privilege in windowmanagement.dll

  • Addresses a security vulnerability issue with user proxies and HTTP-based intranet servers. After installing this update, HTTP-based intranet servers cannot leverage a user proxy by default to detect updates. Scans using these servers will fail if the clients do not have a configured system proxy. If you must leverage a user proxy, you must configure the behavior using the Windows Update policy “Allow user proxy to be used as a fallback if detection using system proxy fails.” This change does not affect customers who secure their Windows Server Update Services (WSUS) servers with the Transport Layer Security (TLS) or Secure Sockets Layer (SSL) protocols. For more information, see Ensuring clients stay secure, changes to scans against Windows Server Update Service (WSUS) servers.

  • Security updates to Windows App Platform and Frameworks, Microsoft Graphics Component, Windows Input and Composition, Windows Media, Windows Shell, Windows Cloud Infrastructure, Windows Fundamentals, Windows Management, Windows Kernel, Windows Virtualization, Windows Storage and Filesystems, the Microsoft Scripting Engine, and the Microsoft JET Database Engine.

Known issues in this update

No new bugs on this cumulative update. In case the IME editor doesn’t work after applying this security update, uninstall and reinstall the language packs. The error is specific to Japanese and Chinese IME editors. To know more, please see KB4564002.

How to Get the KB4571756 Cumulative Update

Note: Before applying the latest cumulative update, make sure to download and install the related SSU to your device. This, in turn, ensures the whole update process completes successfully.

Servicing Stack Direct LinksKB4577266

Now that you have installed the appropriate SSU, get the Sept security patch from any of the below channels –

Release Channel Procedure
Windows Update and Microsoft Update

Usually, the system automatically downloads this for you. If not, reach out to Settings > Update & Security > Windows Update and hit Check for Updates

Microsoft Update Catalog Visit the Microsoft Update Catalog Site to download the standalone file.
Windows Server Update Services (WSUS)

Nothing specific to do if you have already configured your PC as follows –

Product: Windows 10, version 1903 and later

Classification: Security Updates

Release Note: Update Catalog