You can download and install the update using the direct download links shared below, or through Windows Update. This update applies to Windows 10 versions 21H2, 21H1, and 20H2 (Enterprise, IoT Enterprise, and Education versions). The table below indicates what the build of your OS will be after installing KB5015807: Since this is a cumulative update, it includes all the fixes and improvements introduced with KB5014666 which was released earlier as an optional “type D” update, and another improvement impacting Windows PowerShell. With that, it also has a few known issues. Let us discuss the improvements as well as the issues before proceeding to learn how to install this update.
Fixes and Improvements
Apart from one additional improvement, all the fixes that were included in the optional update KB5014666 are a part of KB5015807. Therefore, if you already installed the previous update, only the new improvements will be included with this flight.
Fixes and Improvements Known Issues Download and Install Windows 10 KB5015807 Offline Installers For Windows 10 Version 21H2 For Windows 10 Version 21H1 For Windows 10 Version 20H2 (Enterprise & Education Editions) Windows Update Rollback/Remove Windows 10 Cumulative Update Cleanup After Installing Windows Updates
The new improvement in this flight is that it fixes an issue that redirected the PowerShell command output so that transcript logs do not contain any content. Transcript logs might contain decrypted passwords if you turn PowerShell logging on. Consequently, the transcript logs lose the decrypted passwords. With these improvements, there are also a few known issues with the update.
Known Issues
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 has a custom offline media or an ISO image installed 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. Users might be unable to install the update 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. The IE mode tabs in Microsoft Edge might stop responding when a site displays a modal dialog box – a form or dialog box that requires the user to respond before continuing with other portions of the webpage or app. If you are impacted by the issue after installing the update, Microsoft suggests using the Known Issue Rollback (KIR) Group Policy, which can be downloaded from the link below: Download Known Issue Rollback Group Policy for Windows 10 Note: The policy will need to be installed and configured according to your Windows version, which you can confirm by typing in winver in the Run Command box.
Download and Install Windows 10 KB5015807
This update can be installed through Windows Update, Windows Update for Business, Standalone installers, and Windows Server Update Services (WSUS). Download Known Issue Rollback Group Policy for Windows 10 Note: The policy will need to be installed and configured according to your Windows version, which you can confirm by typing in winver in the Run Command box. We have given the direct download links to the standalone installers below, using which you can install the update on your respective Windows 10 version, or you can simply update to the latest build using Windows Update through the given guide below.
Offline Installers
For Windows 10 Version 21H2
Download KB5015807 for Windows 10 Version 21H2 64-Bit [693.9 MB] Download KB5015807 for Windows 10 Version 21H2 32-Bit [330.4 MB]
For Windows 10 Version 21H1
Download KB5015807 for Windows 10 Version 21H1 64-Bit [693.9 MB] Download KB5015807 for Windows 10 Version 21H1 32-Bit [330.4 MB]
For Windows 10 Version 20H2 (Enterprise & Education Editions)
Download KB5015807 for Windows 10 Version 20H2 64-Bit [693.9 MB] Download KB5015807 for Windows 10 Version 20H2 32-Bit [330.4 MB] To install the update, simply run the downloaded MSU file and Windows will automatically install the update. To download any other updates related to any of the above, please check the Microsoft Catalog.
Windows Update
To install this update via Windows Update, you need to be running Windows 10 version 21H2, 21H1, or 20H2 (Enterprise or Education editions). To check your version of the operating system, type in winver in the Run Command box and press Enter. Once ensured you have the right OS version, perform the following steps to install KB5015807: When the computer reboots, the update will have been successfully installed. To confirm this, check the updated build number by typing in winver in the Run Command box. When it downloads, click Install Now.
Rollback/Remove Windows 10 Cumulative Update
If you do not wish to keep the installed update for some reason, you can always roll back to the previous build of the OS. However, this can only be performed within the next 10 days after installing the new update. To roll back after 10 days, you will need to apply this trick.
Cleanup After Installing Windows Updates
If you want to save space after installing Windows updates, you can run the following commands one after the other in Command Prompt with administrative privileges:
