DNS_ERROR_INVALID_DATAFILE_NAME 0x800725B4

What it means

DNS_ERROR_INVALID_DATAFILE_NAME is a Windows error code (system error 9652, returned as HRESULT 0x800725B4) reported by Windows. Its official message is: “Invalid datafile name for DNS zone.”

How to fix DNS_ERROR_INVALID_DATAFILE_NAME

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)
4. Test connectivity to the remote host first (ping, then the exact port)
5. Check firewall, VPN and proxy rules for the involved process
6. Run 'ipconfig /flushdns' and 'netsh interface ip reset', then reboot

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