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Windows 10 Enterprise LTSC 2021 known issues and notifications

Find information on known issues and the servicing status for Windows 10 Enterprise LTSC 2021 and Windows 10 IoT Enterprise LTSC 2021. For immediate help with Windows update issues, click here if you are using a Windows device to open the Get Help app or go to support.microsoft.com. Follow @WindowsUpdate on X for Windows release health updates. If you are an IT administrator and want to programmatically get information from this page, use the Windows Updates API in Microsoft Graph.

Current status as of May 2, 2025

Windows 10 Enterprise LTSC 2021 and Windows 10 IoT Enterprise LTSC 2021 will have mainstream support until January 12, 2027. 
 
Windows 10, version 21H2 Home and Pro editions reached end of servicing on June 13, 2023. Education and Enterprise editions reached end of servicing on June 11, 2024. Devices running these editions do not receive security updates containing protections from the latest security threats. 
 
As always, we recommend that you upgrade eligible devices to Windows 11. For information about servicing timelines and lifecycle, see Windows 11 release information, Windows 10 release information, Windows Lifecycle FAQ, and Microsoft Lifecycle Policy search tool
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    Known issues

    See open issues, content updated in the last 30 days, and information on safeguard holds. To find a specific issue, use the search function on your browser (CTRL + F for Microsoft Edge).

    SummaryOriginating updateStatusLast updated
    An incorrect "End of Support" message might appear in Windows Settings
    Devices enrolled in the Extended Security Updates (ESU) program and LTSC 2021 editions will continue to receive updates.
    OS Build 19044.6456
    KB5066791
    2025-10-14
    Mitigated
    2025-11-03
    11:24 PT

    Issue details

    November 2025

    An incorrect "End of Support" message might appear in Windows Settings

    StatusOriginating updateHistory
    MitigatedOS Build 19044.6456
    KB5066791
    2025-10-14
    Last updated: 2025-11-03, 11:24 PT
    Opened: 2025-11-03, 10:53 PT

    The message, "Your version of Windows has reached the end of support", might incorrectly display in the Windows Update Settings page for the following OS versions:

    • ​Windows 10, version 22H2 Pro, Education or Enterprise editions that are correctly enrolled in the Extended Security Updates (ESU) program and configured with an ESU product key
    • ​Windows 10 Enterprise LTSC 2021
    • ​Windows 10 IoT Enterprise LTSC 2021

    The message might occur after installing Windows updates released on or after October 14, 2025 (KB5066791).

    This issue only involves the incorrect display of the "end of support" message.

    • ​Windows 10 devices that have an activated ESU license will continue to receive security updates.
    • ​Windows 10 Enterprise LTSC 2021 and Windows 10 IoT Enterprise LTSC 2021 remain in support and will continue to receive security updates according to their respective lifecycles.

    Workaround:

    Microsoft pushed a cloud configuration update to correct this issue. However, you might not receive this update if the device:

    If you are still seeing the incorrect "end of support" message, enterprise-managed devices managed by IT departments can resolve the issue using Known Issue Rollback (KIR) by installing and configuring the special Group Policy listed below. 

    Group Policy downloads with Group Policy name:  

    The special Group Policy can be found in Computer Configuration > Administrative Templates > KB5066791 251020_20401 Known Issue Rollback > Windows 10, version 20H2, 21H1, 21H2 and 22H2. For information on deploying and configuring this special Group Policy, please see How to use Group Policy to deploy a Known Issue Rollback

    Important: You will need to install and configure the Group Policy, setting the KB5066791 251020_20401 Known Issue Rollback value to Disabled, to resolve this issue. You will also need to restart your device(s) to apply the group policy setting.

    Next Steps: We are working to include the resolution in a future Windows update. Once the update with the resolution is released, organizations will not need to install and configure this Group Policy to address this issue. 

    Affected platforms:

    • ​Client: Windows 10, version 22H2; Windows 10, version 21H2
    • ​Server: None
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