Unlike standard consumer tools like Lenovo Vantage or System Update , the Maintenance Utility (often referred to as the Hardware Maintenance Diskette or HMD) is designed for hardware-level service. When a motherboard is replaced, it arrives "blank" without a serial number, which can cause "Invalid Machine Type/Serial Number" errors at boot and prevent official software updates. Key Features of Version 2.02

Serial numbers must usually be entered in a specific 20-character format (e.g., 1S + MTM + Serial ).

Search for "Maintenance Utility" or your specific model on the Lenovo Support Portal to check for publicly available versions for your hardware.

Clears or resets existing identity data if a system was incorrectly configured.