The BIOS Service Provider (BSP) Windows driver refers to software that facilitates communication between the operating system (Windows) and the BIOS (Basic Input/Output System) of the computer. The BIOS is a firmware interface that initializes and tests hardware during the boot process, before passing control to the operating system. The BSP driver acts as a bridge between Windows and the BIOS, allowing the OS to communicate with and make use of BIOS-level services for tasks like power management, hardware configuration, and system settings.
In modern systems, this driver may also be tied to UEFI (Unified Extensible Firmware Interface), which is a more modern replacement for the legacy BIOS in most newer computers.