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Windows 8.1 and Windows Server 2012 R2

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Find information on known issues and the servicing status for Windows 8.1 and Windows Server 2012 R2. 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 (formerly Twitter) 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.

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Current status as of January 10, 2023:

All editions of Windows 8.1 have reached end of servicing as of January 10, 2023. Technical assistance and software updates are no longer provided for this version. We recommend upgrading any devices running Windows 8.1 to a more current, in-service, and supported Windows release. If a device does not meet the technical requirements to run a more current release of Windows, we recommend that you replace the device with one that supports Windows 11. Microsoft will not be offering an Extended Security Update (ESU) program for Windows 8.1. Continuing to use Windows 8.1 might increase an organization’s exposure to security risks or impact its ability to meet compliance obligations.

For detailed information, see the entry for Windows 8.1 end of servicing at learn.microsoft.com lifecycle page, and Windows 8.1 support will end on January 10, 2023 at support.microsoft.com.

Windows Server 2012 R2 will reach end of support on October 10, 2023. All editions of this Windows version will be limited to ESU beyond this date. For more information, see the Windows Server 2012 R2 lifecycle page.

For information about servicing timelines and lifecycle, Lifecycle FAQ - Windows.

    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
    August 2024 security update might impact Linux boot in dual-boot setup devices
    This issue might impact devices with dual-boot setup for Windows and Linux when SBAT setting is applied
    		 KB5041828
    2024-08-13    		Mitigated
    		2024-09-20
    12:30 PT
    Apps that acquire or set Active Directory Forest Trust Information might have issues
    Apps using Microsoft .NET to acquire or set Forest Trust Information might fail, close, or you might receive an error.
    		KB5009624
    2022-01-11    		Mitigated
    		2022-02-07
    15:36 PT
    Certain operations performed on a Cluster Shared Volume may fail
    Operations performed on files or folders on a CSV may fail with the error: STATUS_BAD_IMPERSONATION_LEVEL (0xC00000A5).
    		 KB4480963
    2019-01-08    		Mitigated
    		2020-06-11
    14:06 PT

    Issue details

    August 2024

    August 2024 security update might impact Linux boot in dual-boot setup devices

    StatusOriginating updateHistory
    Mitigated KB5041828
    2024-08-13    		Last updated: 2024-09-20, 12:30 PT
    Opened: 2024-08-21, 18:33 PT

    After installing the August 2024 Windows security update, (KB5041828) or the August 2024 preview update, you might face issues with booting Linux if you have enabled the dual-boot setup for Windows and Linux in your device. Resulting from this issue, your device might fail to boot Linux and show the error message “Verifying shim SBAT data failed: Security Policy Violation. Something has gone seriously wrong: SBAT self-check failed: Security Policy Violation.”

    The August 2024 Windows security and preview updates apply a Secure Boot Advanced Targeting (SBAT) setting to devices that run Windows to block old, vulnerable boot managers. This SBAT update will not be applied to devices where dual booting is detected. On some devices, the dual-boot detection did not detect some customized methods of dual-booting and applied the SBAT value when it should not have been applied.

    IMPORTANT: This known issue only occurs with the installation of the August 2024 security and preview updates. The September 2024 security update (KB5043138) and later updates do not contain the settings that caused this issue. If you install the September 2024 update, you don’t need to apply the workaround below.

    Workaround:

    If your Linux becomes unbootable after installing the August 2024 security or preview updates, you can recover your Linux system by following these instructions.

    Important: This documentation contains information about how to modify the registry. Make sure that you back up the registry before you modify it. Make sure that you know how to restore the registry if a problem occurs. For more information about how to back up, restore, and modify the registry, see How to back up and restore the registry in Windows. Also, note that modifying firmware settings incorrectly might prevent your device from starting correctly. Follow these instructions carefully and only proceed if you are confident in your ability to do so.

            a) Disable Secure Boot:

    • ​Boot into your device’s firmware settings.
    • ​Disable Secure Boot (steps vary by manufacturer).
            b) Delete SBAT Update:

    • ​Boot into Linux.
    • ​Open the terminal and run the below command:
    sudo mokutil --set-sbat-policy delete
    • ​Enter your root password if prompted.
    • ​Boot into Linux once more.
            c) Verify SBAT Revocations:

    • ​In the terminal, run the below command:
    mokutil --list-sbat-revocations
    • ​Ensure the list shows no revocations.
            d) Re-enable Secure Boot:

    • ​Reboot into the firmware settings.
    • ​Re-enable Secure Boot.
            e) Check Secure Boot Status:

    • ​Boot into Linux. Run the below command:
     mokutil --sb-state
    • ​The output should be “SecureBoot enabled”. If not, retry step d).
            f) Prevent Future SBAT Updates in Windows:

    • ​Boot into Windows.
    • ​Open Command Prompt as Administrator and run:
    reg add HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecureBoot\SBAT /v OptOut /d 1 /t REG_DWORD

    At this point, you should now be able to boot into Linux or Windows as before. It’s a good time to install any pending Linux updates to ensure your system is secure.

    NOTE: On Windows-only systems, after installing the September 2024 or later updates, you can set the registry key documented in CVE-2022-2601 and CVE-2023-40547 to ensure the SBAT security update is applied. On systems that dual-boot Linux and Windows, there are no additional steps necessary after installing the September 2024 or later updates.

    Next Steps: We are working on a final resolution that will be available in a future Windows update. We recommend you install the September 2024 update or later Windows updates to avoid this issue.

    Affected platforms:

    • ​Client: Windows 11, version 23H2; Windows 11, version 22H2; Windows 11, version 21H2; Windows 10, version 22H2; Windows 10, version 21H2; Windows 10 Enterprise 2015 LTSB
    • ​Server: Windows Server 2022; Windows Server 2019; Windows Server 2016; Windows Server 2012 R2; Windows Server 2012

    February 2022

    Apps that acquire or set Active Directory Forest Trust Information might have issues

    StatusOriginating updateHistory
    Mitigated KB5009624
    2022-01-11    		Last updated: 2022-02-07, 15:36 PT
    Opened: 2022-02-04, 16:57 PT

    After installing updates released January 11, 2022 or later, apps using Microsoft .NET Framework to acquire or set Active Directory Forest Trust Information might fail, close, or you might receive an error from the app or Windows. You might also receive an access violation (0xc0000005) error. Note for developers: Affected apps use the System.DirectoryServices API.

    Next Steps: This issue was resolved in the out-of-band update for the version of .NET Framework used by the app. Note: These out-of-band updates are not available from Windows Update and will not install automatically. To get the standalone package, search for the KB number for your version of Windows and .NET Framework in the Microsoft Update Catalog. You can manually import these updates into Windows Server Update Services (WSUS) and Microsoft Endpoint Configuration Manager. For WSUS instructions, see WSUS and the Catalog Site. For Configuration Manger instructions, see Import updates from the Microsoft Update Catalog.

    For instructions on how to install this update for your operating system, see the KB articles listed below:

    • ​Windows Server 2022: 
    • ​Windows Server 2019: 
    • ​Windows Server 2016: 
    • ​Windows Server 2012 R2: 
    • ​Windows Server 2012:

    Affected platforms:

    • ​Client: None
    • ​Server: Windows Server 2022; Windows Server 2019; Windows Server 2016; Windows Server 2012 R2; Windows Server 2012

    January 2019

    Certain operations performed on a Cluster Shared Volume may fail

    StatusOriginating updateHistory
    Mitigated KB4480963
    2019-01-08    		Last updated: 2020-06-11, 14:06 PT
    Opened: 2019-01-08, 10:00 PT

    Certain operations, such as rename, that you perform on files or folders that are on a Cluster Shared Volume (CSV) may fail with the error, “STATUS_BAD_IMPERSONATION_LEVEL (0xC00000A5)”. This occurs when you perform the operation on a CSV owner node from a process that doesn’t have administrator privilege.

    Affected platforms:

    • ​Client: Windows 8.1; Windows 7 SP1
    • ​Server: Windows Server 2012 R2; Windows Server 2012; Windows Server 2008 R2 SP1; Windows Server 2008 SP2

    Workaround: Do one of the following:

    • ​Perform the operation from a process that has administrator privilege.
    • ​Perform the operation from a node that doesn’t have CSV ownership.

    Next steps: Microsoft is working on a resolution and will provide an update in an upcoming release.


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