For Think-branded machines, it typically executes the ThinkPad Maintenance Utility .
When created using the official usbfmtpw.exe utility, the resulting USB key is often given top boot priority by the BIOS, bypassing standard boot order settings. How to Use the Lenovo U1 Tool (Step-by-Step) lenovo u1 tool best
Find the on the motherboard (usually near the RAM slots or under the bottom cover). For Think-branded machines
The U1 Tool is technically a Lenovo Internal resource. Using unofficial versions from third-party sites carries a risk of malware or firmware corruption. lenovo u1 tool best
For other product lines like ThinkBook, IdeaPad, and Desktops, it uses the "Golden Key" protocol to write firmware-level data.