, is a utility used by service technicians to update or "rebrand" critical machine information on a system board. It is most commonly used after a motherboard replacement to input the correct serial number and model information so that the system is recognized as a valid Lenovo product. Key Features of the Lenovo U1 Tool DMI Updating : Allows technicians to flash specific identifiers like the Serial Number (SN) Machine Type Model (MTM) Product Name directly to the BIOS/UEFI. Error Resolution