ERROR_MRM_INVALID_QUALIFIER_OPERATOR 0x80073B21

Error code 15137 · HRESULT 0x80073B21

WINDOWS

Invalid qualifier operator.

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_MRM_INVALID_QUALIFIER_OPERATOR is a Windows error code (system error 15137, returned as HRESULT 0x80073B21) reported by Windows. Its official message is: “Invalid qualifier operator.”

How to fix ERROR_MRM_INVALID_QUALIFIER_OPERATOR

  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_MRM_INVALID_QUALIFIER_VALUEERROR_MRM_INVALID_PRI_FILEERROR_MRM_INVALID_RESOURCE_IDENTIFIERERROR_MRM_INVALID_FILE_TYPEERROR_MRM_UNSUPPORTED_PROFILE_TYPEERROR_MRM_INDETERMINATE_QUALIFIER_VALUEERROR_MRM_MAP_NOT_FOUND

Source: Microsoft WinError.h

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