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Windows Server 2012 known issues and notifications

Find information on known issues and the servicing status for Windows Server 2012. 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.

Current status as of May 2, 2025

As of October 10, 2023, Windows Server 2012 has reached end of support. Extended Security Updates (ESU) are available until October 13, 2026, with an option to migrate your on-premises servers to Azure, where you can continue to run them on virtual machines.  
To learn more, see the Windows Server 2012 lifecycle article. 
Note: Windows Server 2025 is now the latest Long-Term Servicing Channel (LTSC) release for Windows Server. To download a free 180-day evaluation, visit the Microsoft Evaluation Center. 

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
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).
 KB4480975
2019-01-08		Mitigated
2020-06-11
14:06 PT

Issue details

January 2019

Certain operations performed on a Cluster Shared Volume may fail

StatusOriginating updateHistory
Mitigated KB4480975
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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