Extract the U1 package (often found in repositories like GitHub's lenovo-u1-tool ) and run u1.exe to move the service modules onto the USB drive.
The , also known as the Lenovo Golden Key U1 , is an essential utility for field technicians and advanced users who need to update critical system board information in a laptop's UEFI/BIOS. It is widely considered the best tool for re-branding a motherboard after a replacement or repair, as it allows for the manual entry of factory DMI data. Core Functions of the Lenovo U1 Tool lenovo u1 tool best