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How to fix error 0xc000012f

Glenn Mason 0 Reputation points
2026-01-13T22:57:01.3166667+00:00

How to eliminate windows SecurityHealthSSO message that pops up every time computer is turned on.

Windows for business | Windows for IoT
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  1. Jason Nguyen Tran 19,305 Reputation points Independent Advisor
    2026-01-13T23:44:39.67+00:00

    Hi Glenn Mason,

    The error code 0xc000012f usually indicates a corrupted or incompatible system file, often related to Windows updates or application dependencies. To resolve this, I recommend running the System File Checker (sfc /scannow) and the DISM tool (DISM /Online /Cleanup-Image /RestoreHealth) from an elevated Command Prompt to repair any damaged files. Additionally, ensure your system is fully updated through Windows Update, as patches often address these issues.

    Regarding the SecurityHealthSSO message that appears at startup, this is tied to the Windows Security app and its sign-on process. If it continues to pop up, you can disable the SecurityHealth entry in Task Scheduler or check for pending updates to the Windows Security platform. In some cases, reinstalling or resetting the Windows Security app through PowerShell (Get-AppxPackage Microsoft.SecHealthUI | Reset-AppxPackage) can eliminate the recurring prompt.

    If this guidance helps resolve your concern, please click “Accept Answer” to mark it as resolved so others can benefit as well 😊.

    Jason.

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  2. AI answer

    2026-01-13T22:57:38.8866667+00:00

    To address the error code 0xc000012f, which typically indicates a problem with a corrupted application or system file, you can try the following steps:

    1. Run System File Checker (SFC): This tool scans for and restores corrupted system files. Open Command Prompt as an administrator and run the command: 
         sfc /scannow
      Wait for the process to complete and follow any on-screen instructions.
    2. Use DISM Tool: If SFC doesn't resolve the issue, you can use the Deployment Imaging Service and Management Tool (DISM) to repair the Windows image. Run the following command in an elevated Command Prompt: 
         DISM /Online /Cleanup-Image /RestoreHealth
      After it completes, run the SFC command again.
    3. Check for Windows Updates: Ensure your system is up to date with the latest patches and updates from Microsoft. Go to Settings > Update & Security > Windows Update and check for updates.
    4. Reinstall the Application: If the error is associated with a specific application, try uninstalling and then reinstalling that application.

    Regarding the Windows SecurityHealthSSO message that appears at startup, this can often be related to issues with the Windows Security service. Here are some steps you can take:

    1. Check Windows Security Services: Ensure that the necessary services are running. Open the Services app and check the status of the SecurityHealthService and wscsvc services. Make sure they are set to Automatic and are running.
    2. Disable Notifications: If you want to stop the notifications, you can go to Settings > System > Notifications & actions and turn off notifications for Windows Security.
    3. Reset Windows Security: If the problem persists, consider resetting Windows Security settings to default. You can do this through the Windows Security app under Virus & threat protection settings.
    4. Repair Windows Installation: If none of the above solutions work, consider performing a repair installation of Windows, which can fix underlying issues without affecting your files.

    These steps should help you troubleshoot and potentially resolve both the error code and the notification issue.

    AI-generated content may be incorrect. Read our transparency notes for more information.

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  3. Jason Nguyen Tran 19,305 Reputation points Independent Advisor
    2026-01-15T03:09:51.71+00:00

    Hi Glenn Mason,

    Just checking in, were you able to get the issue resolved? If so, it would be great if you could mark the answer as Accepted so others in the community can benefit from your experience. Thank you!

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