ERROR_SECUREBOOT_POLICY_UNKNOWN 0x8007114C

Error code 4428 · HRESULT 0x8007114C

WINDOWS

The Supplemntal Policy is not recognized on this device.

Windows troubleshooting diagram: Device Manager warning and a system file scan
Windows errors: check drivers, system files and Event Viewer, in that order.

What it means

ERROR_SECUREBOOT_POLICY_UNKNOWN is a Windows error code (system error 4428, returned as HRESULT 0x8007114C) reported by Windows. Its official message is: “The Supplemntal Policy is not recognized on this device.”

How to fix ERROR_SECUREBOOT_POLICY_UNKNOWN

  1. Reboot once — many one-off system codes disappear with a clean restart
  2. Repair system files: 'sfc /scannow' then 'DISM /Online /Cleanup-Image /RestoreHealth'
  3. Find the source in Event Viewer → System: filter for this exact code and open its provider link

Related errors

ERROR_SECUREBOOT_POLICY_MISSING_ANTIROLLBACKVERSIONERROR_SECUREBOOT_POLICY_NOT_AUTHORIZEDERROR_SECUREBOOT_POLICY_ROLLBACK_DETECTEDERROR_SECUREBOOT_POLICY_NOT_SIGNEDERROR_SECUREBOOT_FILE_REPLACEDERROR_SECUREBOOT_PLATFORM_ID_MISMATCHERROR_SECUREBOOT_NOT_ENABLED

Source: Microsoft WinError.h

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