Windows 10 KB4571756 download
September update

Windows 10 update KB4571756 releases for version 2004

The KB4571756 update is now available out for Windows 10 version 2004 to fix several problems. Microsoft is also updating older versions – here's all you need to know.

As part of the Patch Tuesday rollout for September 2020, Microsoft is releasing update KB4571756 for devices running Windows 10 version 2004, May 2020 Update, to address a few security issues.

KB4571756 bumps the version number to build 19041.508, and according to the software giant, this release improves security for input devices, basic operations, and Office apps, and includes an update for storing and managing files.

In addition, the company is pushing updates for older versions of Windows 10, including for version 1909, 1903, 1809, 1803, 1709, 1703, 1607, and 1507.

Update KB4571756 for Windows 10 version 2004

Microsoft has announced KB4571756 in the Windows support site, and it’s referred as “September 8, 2020—KB4571756 (OS Build 19041.508).” If you’re already running the Windows 10 May 2020 Update, this update will address these problems:

  • Fixes a problem 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.

You can download the updates to install them manually for version 2004 with the links below:

Update KB4574727 for Windows 10 version 1903 and 1909

Microsoft has announced KB4574727 in the Windows support site, and it’s referred as “September 8, 2020—KB4574727 (OS Builds 18362.1082 and 18363.1082).” If you’re already running the Windows 10 November 2019 Update or May 2019 Update on your device, this update will address these problems:

  • 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, the Microsoft Scripting Engine, and the Microsoft JET Database Engine.

Update KB4570333 for Windows 10 version 1809

Microsoft has also announced KB4570333 in the Windows support site, and it’s referred as “September 8, 2020—KB4570333 (OS Build 17763.1457).” If you’re already running the Windows 10 October 2019 Update on your device, this update will address these issues:

  • 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.

Update for older versions of Windows 10

The April 2018 Update, version 1803, has reached the end of support on November 12, 2019, but the company has released update KB4577032 to fix several problems while bumping the version number to build 17134.1726.

Although the version 1709 (Fall Creators Update) is no longer supported, organizations running the Enterprise or Education edition of Windows 10 are getting update KB4577041 to address a few issues and bumps the version number to 16299.2107.

In addition, Microsoft has ended support for Windows 10 version 1703 (Creators Update), but organizations with devices still running this release can now download KB4577021, which resolves a few problems and ramps the version number to build 15063.2500.

The Windows 10 Anniversary Update (version 1607) is getting update KB4577015 to fix some issues, even though operating system is no longer supported, and the update bumps the version number to build 14393.3930

Finally, the original release of Windows 10 is getting update KB4577049. The release increase the version number to 10240.18696 and fixes several problems.

Uninstall update KB4571756 to fix problems

If the KB4571756 update is causing issues on your device, you can always uninstall it to revert the changes.

To uninstall KB4571756 or any other quality update on Windows 10, use these steps:

  1. Open Start.

  2. Search for Command Prompt, right-click the top result and select the Run as administrator option.

  3. Type the following command to view the update history and press Enter:

    wmic qfe list brief /format:table
  4. Check the Windows Update history of your device, and identify the update by its HotFixID and InstalledOn information.

  5. Type the following command to uninstall the update from your computer and press Enter:

    wusa /uninstall /kb:4571756

    In the command, replace “4571756” for KB number that correspond to the update that you’re trying to uninstall. For example, if you’re trying to uninstall update KB4571756, then the number that you can have to use in the command is “4571756.”

  6. Click the Yes button.

  7. Continue with the on-screen directions (if applicable).

Once you complete the steps, the recently installed update will be removed from your computer fixing any issues as a result of the release.

If your computer won’t boot after installing KB4571756, you can remove update from the Advanced startup environment using these steps.

Download September 2020 update for Windows 10

These updates are available immediately, they’ll download and install automatically, but you can always force the update from Settings Update & Security > Windows Update and clicking the Check for updates button. If you’re downloading an optional update, then you’ll also need to click the Download and install option. You can find more details about the most recent updates in the Windows 10 update history tracker guide.