Download Windows 10 Cumulative Updates for September 2021 (KB5005565)

Microsoft launches cumulative updates every second Tuesday of the month. For September Patch Tuesday of 2021, Microsoft has released the update KB5005565 for Windows 10 versions 21H1, 20H2, and 2004. This update includes both security and non-security fixes for the operating system. Only one non-security fix has been made that focuses on a fix for Windows PowerShell that was creating infinite numbers of child directories.

Since all 3 versions of Windows 10 have the same common core, the cumulative update is applicable to all. This update ought to be installed automatically on your system if you have the mentioned version of the OS, and the automatic update feature is enabled.

Let us continue to discuss what this update offers and whether or not there are any known issues with it, that may eventually affect your work routine.

Download Windows 10 Cumulative Updates for September 2021 KB5005565
Download Windows 10 Cumulative Updates for September 2021 KB5005565


There is only one non-security issue fixed in this update: the automatic creation of infinite child directories while using the Move-Item Windows PowerShell command. Such instances resulted in PowerShell creating an unending number of child directories, and the system ceased to respond altogether. 

With KB5005565, Microsoft has fixed this issue for Windows 10 v21H1, v20H2, and v2004.

Microsoft claims to have also included updates for Microsoft Hololens. They have included this update directly to Windows Update to increase the reliability of their product, in case some devices have not been updated previously.

Furthermore, as with most Microsoft cumulative updates in the past, they have also incorporated a Servicing Stack Update (SSU) which makes improvements to the update channel from Microsoft.

For more information about the update, you can check out the following KB article:


If you are interested in learning more about the security fixes, please refer to the Release Note for September 2021.

After installing this update, the updated OS build for all three Windows versions will become:

Windows 10 Version 21H1 >> 19043.1237
Windows 10 Version 20H2 >> 19042.1237
Windows 10 Version 2004 >> 19041.1237

Known issues

An update from Microsoft is not always entirely reliable. These updates have been in the works for quite some time and users on the insider channels are testing them beforehand before these updates are made available to the public.

Even though these are pre-tested, the updates still have some issues that are publicly announced by Microsoft. Therefore, we suggest that you consider them before installing the update.

An issue with the standalone (clean) installation of Windows 10 with this update is causing Microsoft Edge Legacy to be removed. However, it is not being replaced by the new Chromium-based Edge. This occurs only when Windows is installed a custom offline media or an ISO image that does not include the 29th March 2021 SSU update.

Microsoft suggests that you either install the March SSU update through slipstreaming or simply update an existing OS through Windows Update, so you will not be facing this issue. Alternatively, you can simply download and install the new Microsoft Edge if you have already encountered this problem.

Another issue that users might face with this update is that they are unable to install it entirely. This may be because of a previously installed update KB5003690. If that is the case, you can find a workaround for it here in Microsoft’s post.

Download Windows Cumulative Update KB5005563 offline installers

For Windows 10 Version 21H1

Download KB5005565 for Windows 10 Version 21H1 64-Bit [602.6 MB]

Download KB5005565 for Windows 10 Version 21H1 32-Bit [277.4 MB]

For Windows 10 Version 20H2

Download KB5005565 for Windows 10 Version 20H2 64-Bit [602.6 MB]

Download KB5005565 for Windows 10 Version 20H2 32-Bit [277.4 MB]

For Windows 10 Version 2004

Download KB5005565 for Windows 10 Version 2004 64-Bit [602.6 MB]

Download KB5005565 for Windows 10 Version 2004 32-Bit [277.4 MB]

To install the update, simply run the downloaded MSU file and Windows will automatically install the cumulative update.

You can check out your current Windows build by launching Run and then typing winver.

To download any other updates related to any of the above, please check the Microsoft Catalog.

Uninstall the cumulative updates

Here is a quick guide on how you can uninstall the updates on your computer if you face any issues with them:

Uninstall updates using Windows Update History tool

  1. Navigate to the following:
    Start Menu ->Settings –> Update & Security –> Windows Update.
  2. From the right-hand pane, click on View Update History.
  3. Now click on Uninstall updates.
  4. Select Update for Microsoft Windows with the relevant update name and press the Uninstall button.

Uninstall updates using command-line

You can also delete the update by entering several commands in the Command Prompt. Here is how:

  1. Open Command Prompt (Run –> cmd)
  2. Run the following command:
    wmic qfe list brief /format:table
  3. This will show all the updates installed on the computer. Make sure the relevant updates are on the list.
  4. To uninstall the update, run the following command
    wusa /uninstall /kb:UpdateName
    Replace UpdateName with the number from the update. For example, if the update you want to uninstall is KB5005565, you should enter the following command:
    wusa /uninstall /kb:5005565

Restart your computer once the update is uninstalled.

Cleanup after installing Windows Updates

If you want to save space after installing Windows updates, you can run the following commands:

dism.exe /Online /Cleanup-Image /AnalyzeComponentStore
dism.exe /Online /Cleanup-Image /StartComponentCleanup

Also see:

Subhan Zafar

Subhan holds a degree in Electrical Engineering and has completed several systems and network certifications including Huwaei, Cisco and Microsoft certs. He mostly researches and writes about the Windows world.