ERROR_MUI_INVALID_ULTIMATEFALLBACK_NAME 0x80073B00

Error code 15104 · HRESULT 0x80073B00

WINDOWS

The RC Manifest has invalid ultimatefallback name.

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_MUI_INVALID_ULTIMATEFALLBACK_NAME is a Windows error code (system error 15104, returned as HRESULT 0x80073B00) reported by Windows. Its official message is: “The RC Manifest has invalid ultimatefallback name.”

How to fix ERROR_MUI_INVALID_ULTIMATEFALLBACK_NAME

  1. Run the Windows Update troubleshooter (Settings → System → Troubleshoot → Other tools)
  2. Reset update components: stop 'wuauserv' and 'bits', clear C:\Windows\SoftwareDistribution, restart both services
  3. Verify system file integrity with 'sfc /scannow'

Related errors

ERROR_MUI_INVALID_LOCALE_NAMEERROR_MUI_INVALID_RC_CONFIGERROR_MUI_INVALID_FILEERROR_MUI_FILE_NOT_LOADEDERROR_RESOURCE_ENUM_USER_STOPERROR_MUI_INTLSETTINGS_UILANG_NOT_INSTALLEDERROR_MUI_FILE_NOT_FOUND

Source: Microsoft WinError.h

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