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.
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
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
For Windows 10 Version 20H2
For Windows 10 Version 2004
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
- Navigate to the following:
Start Menu ->Settings –> Update & Security –> Windows Update.
- From the right-hand pane, click on View Update History.
- Now click on Uninstall updates.
- 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:
- Open Command Prompt (Run –> cmd)
- Run the following command:
wmic qfe list brief /format:table
- This will show all the updates installed on the computer. Make sure the relevant updates are on the list.
- 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
- Download KB5000808 Cumulative Update For Windows 10 Version 1909 18363.1440
- Download And Install KB4556799 Windows 10 Cumulative Update For May 2020 [Version 1909, 1903]
- Microsoft Releases Cumulative Preview Update KB5000842 to Windows 10 v20H2 & v2004
- Cumulative Update KB5001330 for Windows 10 versions 2004 and 20H2
- Download and install Windows 10 update KB4577586 for removal of Adobe Flash Player