ERROR_MUI_INTLSETTINGS_UILANG_NOT_INSTALLED 0x80073B03

Error code 15107 · HRESULT 0x80073B03

WINDOWS

UI language installation failed.

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_INTLSETTINGS_UILANG_NOT_INSTALLED is a Windows error code (system error 15107, returned as HRESULT 0x80073B03) reported by Windows. Its official message is: “UI language installation failed.”

How to fix ERROR_MUI_INTLSETTINGS_UILANG_NOT_INSTALLED

  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_INTLSETTINGS_INVALID_LOCALE_NAMEERROR_MUI_FILE_NOT_LOADEDERROR_MUI_INVALID_ULTIMATEFALLBACK_NAMEERROR_MUI_INVALID_LOCALE_NAMEERROR_RESOURCE_ENUM_USER_STOPERROR_MRM_RUNTIME_NO_DEFAULT_OR_NEUTRAL_RESOURCEERROR_MRM_INVALID_PRICONFIG

Source: Microsoft WinError.h

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