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    • Unzip the ASUS_Flash_Tool_v10014.zip file to a folder (e.g., C:\ASUS_Flash_Tool). Do not run from inside the zip.

    ASUS Flash Tool is a Windows-based application designed to flash stock ROM files onto ASUS devices. Unlike ADB sideloading, which is used for OTA (Over-the-Air) updates, the Flash Tool writes the entire operating system partition by partition. This makes it the primary solution for:

    Even with the latest free version, you might encounter issues. Here is how to fix them.

    | Error Message | Cause | Solution | |---|---|---| | "No device in recovery mode detected" | Router not in rescue mode or wrong Ethernet port | Use LAN port 1 (not WAN). Re-enter rescue mode. | | "Failed to connect to ASUS router" | Firewall blocking | Temporarily disable Windows Defender Firewall & any third-party antivirus. | | "Upload timeout" | Corrupted firmware file | Redownload the firmware from ASUS. Verify checksum. | | "The firmware is not compatible" | Mismatched hardware version | Ensure you downloaded firmware for your exact model and HW revision (e.g., A1 vs B2). | | "Error 0x5: Access denied" | Insufficient permissions | Right-click the tool → "Run as administrator". |