Installing this update will upgrade your operating system’s build to 1904x.1503. This is a “Type C” release, which is a preview version released by Microsoft in the third or fourth week of the month. It is an earlier version of the Patch Tuesday update which is to be released the following month and includes only the non-security updates for the OS. Note: KB5009596 has already been released in the Release Preview Channel for Insiders. Continue reading this post to learn what’s new in this release, and how to install it.

Fixes and Improvements in KB5009596

The following improvements have been made to all Windows 10 versions mentioned above:

An issue in Microsoft UI Automation that might cause Microsoft Outlook to stop working has been addressed.The daylight savings time to start in February 2022 instead of March 2022 in Jordan has been addressed.An issue that prevents the Windows Subsystem for Linux 2 (WSL2) localhost relay from starting when you enable Fast Startup has been addressed.Parameters that pass to wmic.exe in telemetry to capture additional usage data to address application compatibility concerns have been added.Addresses an issue in CLSID_InternetExplorer.A reminder to Internet Explorer 11 that notifies users of its upcoming retirement has been added.An issue that might sometimes cause Japanese Microsoft Office applications stop working when you use the new Japanese Input Method Editor (IME) has been addressed.An issue that causes applications to stop working when you type text using the Chinese IME has been fixed.An issue that might cause Windows to stop working when you use the Pen Haptics API has been fixed.Updates the phone number for Windows Activation for locales that have the wrong phone number.An issue that causes a device to incorrectly report itself as noncompliant with Conditional Access because of an antivirus or firewall configuration has been fixed.An issue that stops printing or prints the wrong output when you print using USB on Windows 10, version 2004 or later, has been addressed.Addresses an issue that affects the Remote Desktop screen, in some cases, when you use Advanced Video Coding (AVC) software encoding.Addresses an issue that prevents certain surround sound audio from playing in Microsoft Edge.Addresses a deadlock in vpnike.dll and rasmans.dll.Addresses an issue that affects the Fast Identity Online 2.0 (FIDO2) credential provider and prevents the display of the PIN entry box.Addresses an issue that causes Windows to stop working and generates the error, “IRQL_NOT_LESS_OR_EQUAL.”Addresses an issue that might cause the Get-TPM PowerShell command to fail when it attempts to report Trusted Platform Module (TPM) information.Addresses an issue that causes the AltGr key to stop working if a remote desktop client is running or if RemoteApp was disconnected.A new feature that provides direct access to select your Microsoft Edge profiles from news and interests has been added.A new feature called Sync Your Settings for users who are migrating to Windows 11 has been added.Addresses an issue that causes functioning Bluetooth devices to stop working when you attempt to connect to a non-functioning Bluetooth device.Addresses an issue that causes lsass.exe to stop working and the device restarts. This issue occurs when you query Windows NT Directory Services (NTDS) counters after the NTDS service has stopped.Addresses an issue that fails to apply the Group Policy Object (GPO) “Do not allow compression on all NTFS Volume” in some cases.Addresses an issue that prevents Robocopy from retrying the file copy process.Addresses an issue that might occur when you enable verbose Active Directory Federation Services (AD FS) audit logging and an invalid parameter is logged.Addresses a memory leak that occurs when you call WinVerifyTrust().

Since this is a cumulative update, if you have installed the previous updates, only the new fixes will be applied to your PC. Apart from these improvements, there may be some things wrong with the update that may affect your OS.

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. 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. Users may also see an error message “Your credentials did not work. The credentials that were used to connect to (device name) did not work. Please enter new credentials” when connecting to devices in an untrusted domain using Remote Desktop while using smart card authentication. Microsoft has found a temporary fix around the issue which you can find here. Users may experience a problem after installing KB5008353 where the recent emails are not visible in the search results in Microsoft Outlook. The problem is related to the PST or OST files that store the emails locally on your PC. Microsoft suggests that you disable Windows Desktop Search which will result in Outlook using its own built-in search operations. We have noticed that these issues have been around for Windows 10 for quite some time now. However, Microsoft has not been successful at fixing them as of yet.

Download and Install Windows 10 KB5009596

Offline Installers

For Windows 10 Version 21H2

Download KB5009596 for Windows 10 Version 21H2 64-Bit [653.3 MB] Download KB5009596 for Windows 10 Version 21H2 32-Bit [307.3 MB]

For Windows 10 Version 21H1

Download KB5009596 for Windows 10 Version 21H1 64-Bit [653.3 MB] Download KB5009596 for Windows 10 Version 21H1 32-Bit [307.3 MB]

For Windows 10 Version 20H2

Download KB5009596 for Windows 10 Version 20H2 64-Bit [653.3 MB] Download KB5009596 for Windows 10 Version 20H2 32-Bit [307.3 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. To check your version of the operating system, type in winver in Run and press Enter. Once the PC boots up again, you can then confirm that the update has been installed successfully through winver.

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: Also see:

Windows 10 build 19044.1499 (KB5009596) Released With FixesWindows 10 Cumulative Update KB5009543 Released For 21H2, 21H1, 20H2Download Windows 10 Cumulative Update KB5007186 and KB5007189: Fixes Zero-Day VulnerabilitiesWindows 10 Cumulative Update KB5008212 Released for 21H2, 21H1, 20H2, 2004Windows 11 Cumulative Update KB5008353 Fixes Major Bugs