For the average user, the Basic Input/Output System (BIOS) or its modern counterpart, the UEFI, is a mysterious place. You enter it by pressing F1, F2, or Enter during startup, look at the system time, maybe adjust the boot order, and then exit. But for power users, IT professionals, overclockers, and refurbishers, the factory BIOS settings on a Lenovo laptop or desktop represent a cage.
In this context, the "tool" is a patched BIOS file. You flash the modified binary back to the chip. Lenovo Bios Unlock Tool
Lenovo, known for enterprise-grade security, locks down its BIOS rigorously. Settings for are hidden behind greyed-out menus or removed entirely. For the average user, the Basic Input/Output System