You will need a Windows PC (Windows 10 or 11 recommended), a USB-A to USB-C data cable (not a charging-only cable), and the MediaTek USB VCOM drivers.
The is a low-level Lenovo service utility, not officially published for end users. It operates outside the OS (via bootable USB) and directly interacts with embedded controller (EC) and SPI flash. The new version (often referred as u1_tool_new ) improves compatibility with modern UEFI/BIOS, adds support for newer chipsets (Intel 12th–14th gen, AMD Ryzen 6000+), and fixes bugs in flash verification. lenovo u1 tool new