Cumulative Update KB5001330 for Windows 10 versions 2004 and 20H2

Windows 10 cumulative update 2004 20h2Windows 10 cumulative update 2004 20h2

As part of Patch Tuesdays, Microsoft has released a cumulative update to the stable channel for Windows 10 versions 2004 as well as 20H2. The update KB5001330 was released on April 13th, 2021, which is an all-security update and brings no new features to the OS.

The same update has also been released for the Insiders on the Beta & Release Preview channels on Windows 10 v21H1 that introduces the very same security fixes. However, the stable channel release also includes a Servicing Stack Update (SSU).

Windows 10 cumulative update 2004 20h2
Windows 10 cumulative update 2004 20h2

Installing this update on Windows 10 v2004 will upgrade your OS build to 19041.928. For users on 20H2, this update will change your build to 19042.928.

You may refer to this post to download offline installers of Patch Tuesday April 2021 update for all other Windows 10 versions.

Let us now continue to see exactly what this new release brings to each of the Windows 10 versions.

What’s new in KB5001330

Since both Windows 10 version 2004 and 20H2 have the same core operating mechanism, the effects of the update are also the same. Hence, security fixes in both are also the same. Here is a list of improvements made:

  • The servicing stack has been updated that ensures the users have a robust, hassle-free Windows update experience.
  • An issue in which a principal in a trusted MIT realm fails to obtain a Kerberos service ticket with an error code “KRB_GENERIC_ERROR from Active Directory Domain Controllers (ADDC) has been fixed. This issue started to occur on the devices that had CVE-2020-17049 protections installed on them.
  • Several security vulnerabilities have been fixed by removing the RemoteFX vGPU feature altogether. Microsoft states that all future updates will not have this feature as it brings along security vulnerabilities, which have been identified by a security researcher. More information can be found on this Remote Code Execution vulnerability CVE-2020-1036.
  • The threat of Elevation of Privilege has been fixed in the method the Azure Active Directory (AAD) web sign-in allows arbitrary browsing from third-party endpoints used for federated authentication.
  • Security updates have been made to the following components:
    • Windows App Platform and Frameworks
    • Windows Apps
    • Windows Input and Composition
    • Windows Office Media
    • Windows Fundamentals
    • Windows Cryptography
    • Windows AI Platform
    • Windows Kernel
    • Windows Virtualization
    • Internet Explorer
    • Windows Media

Known issues

As with any update, here is a list of known issues Microsoft is currently aware of with this release:

  • Some system and user certificates might be lost when updating a device from Windows 10 v1809 or later to a later build of the OS. However, Microsoft states that devices using Windows Update for Business or directly connected to Windows Update are not impacted. If you are impacted by this, Microsoft suggests that you roll back to the previous version of the operating system using the steps provided in the article down below.
  • Users might experience not getting the correct Furigana characters when using the Microsoft Japanese Input Method Editor (IME) to enter Kanji characters within an application that automatically allows the input of Furigana characters. Right now, Microsoft does not have a workaround for this.
  • Computers with Windows installations from custom images using slipstreaming to incorporate this update into older images might experience Microsoft Edge missing from their OS.

These issues are repeated from the last stable cumulative release by Microsoft in the update KB5000842, and Microsoft has not been able to fix these yet.

Download Windows cumulative update KB5001330

Install KB5001330 using Windows Update

To install this update using Windows Update, please go to Start Menu –> Settings –> Update & Security –> Windows Update. In the right-hand pane, click on the Check for updates button. The update will then begin to download and install automatically.


Once the download is complete, you will be prompted to reboot the computer. Do so by clicking restart.


Once the system reboots, you can check that your OS has been updated to the respective build number. To check your OS version and build, type in winver in Run.


Download offline installers for KB5001330

These updates can also be installed on any computer that has the relevant version of Windows 10, without having an internet connection. Download the offline installers below as per your Windows 10 version and platform requirements on another PC and carry them over to a PC without an internet connection:

For Windows 10 Version 20H2

Download KB5001330 for Windows 10 Version 20H2 64-Bit [555.4 MB]

Download KB5001330 for Windows 10 Version 20H2 32-Bit [252.5 MB]

For Windows 10 Version 2004

Download KB5001330 for Windows 10 Version 2004 64-Bit [555.4 MB]

Download KB5001330 for Windows 10 Version 2004 32-Bit [252.5 MB]

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

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

Uninstall Windows cumulative updates

If you face any issues with this update, here is a quick guide on how you can uninstall the update on your computer.

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 update 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 that you want to uninstall is KB5001330, you will enter the following command:
    wusa /uninstall /kb:5001330

Restart your computer once the update is removed.

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
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