SecurityHealthSystray.exe – Bad Image 0xC000012F Error

You may be unable to access the Windows Security app on your Windows 11 computer. And when you login to your account, the following error message appears:

SecurityHealthSystray: SecurityHealthSystray.exe - Bad Image

\?\C:\Windows\System32\SecurityHealth\1.0.2303.27001-0\SecurityHealthSSO.dll is either not designed to run on Windows or it contains an error. Try installing the program again using the original installation media or contact your system administrator or the software vendor for support. Error status 0xc000012f

securityhealthsso.dll 0xc000012f

In the error message, the DLL version number varies from system to system, depending upon the Security Platform version installed.


Error 0xc000012f happens if the module SecurityHealthSSO.dll has been corrupted. Replacing the corrupt module with a fresh copy from another computer should fix the issue.


To resolve the issue, replace SecurityHealthSSO.dll with the fresh copy below.

Download SecurityHealthSSO.dll (zipped, all versions)

File Info

Security Platform SHA256 Hash (Hyperlink opens
1.0.2302.21002-0 A48D8FE21EF5AFBEDD6748A97BFE162A7559B69E94C256867930DBE5FE58DAD9
1.0.2303.27001-0 DA848972C5A380513597094B0A2A519DEA7B40723880B55948E8BE18CB08D517
1.0.2303.28002-0 4AFAC953F351FA056D9823F0A2EA0151456C0B2F414851AC306F86A5907BD076
1.0.2306.10002-0 CA991BBF6B28B1A157B52F17649E555479349E339047DF5143332C0386994FB3
1.0.2311.17002-0 F9905B2235BDAE5560E268F179E1F4976F28745BFE8C1BDDB0192322D0592033

  1. Download the archive SecurityHealthSSO.dll (zipped) from the above-mentioned link.
  2. Extract the appropriate version of SecurityHealthSSO.dll to your Desktop. You need to extract the DLL that corresponds to the security platform version mentioned in the error message.
  3. Move the DLL file to the C:\ root.
  4. Let’s say the error message mentions the platform folder 1.0.2303.27001-0. Open an admin Command Prompt and run the following commands:
    takeown /f c:\windows\system32\securityHealth\1.0.2303.27001-0\SecurityHealthSSO.dll /a
    icacls c:\windows\system32\securityHealth\1.0.2303.27001-0\SecurityHealthSSO.dll /grant administrators:F
    copy /y C:\SecurityHealthSSO.dll c:\windows\system32\securityHealth\1.0.2303.27001-0\

    securityhealthsso.dll error 0xc000012f

    (You should see the message “1 file(s) copied.” for the 3rd command.)

  5. Restart Windows. To do so, right-click Start, click Shutdown, and click Restart.

    restart windows 11 via Start button or  Win+X

    Important: Clicking “Shutdown” and powering the unit on will not help.

That’s it. This should fix the SecurityHealthSystray error.

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Ramesh Srinivasan is passionate about Microsoft technologies and he has been a consecutive ten-time recipient of the Microsoft Most Valuable Professional award in the Windows Shell/Desktop Experience category, from 2003 to 2012. He loves to troubleshoot and write about Windows. Ramesh founded in 2005.

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