ERROR_NOT_REGISTRY_FILE 0x800703F9

Error code 1017 · HRESULT 0x800703F9

WINDOWS

The system has attempted to load or restore a file into the registry, but the specified file is not in a registry file format.

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_NOT_REGISTRY_FILE is a Windows error code (system error 1017, returned as HRESULT 0x800703F9) reported by Windows. Its official message is: “The system has attempted to load or restore a file into the registry, but the specified file is not in a registry file format.”

How to fix ERROR_NOT_REGISTRY_FILE

  1. Verify the path/file actually exists and is not blocked by antivirus quarantine
  2. Reinstall the application that raised the error to restore missing files
  3. Check the full path spelling (long paths >260 chars need a registry opt-in)

Related errors

ERROR_REGISTRY_IO_FAILEDERROR_KEY_DELETEDERROR_REGISTRY_CORRUPT0x803F70010xC19001010xC19002080xC19002000xC1900223

Source: Microsoft WinError.h

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