The VIA Standard CPU to PCI Bridge is a driver for the VIA Technologies chipset that facilitates communication between the CPU (Central Processing Unit) and the PCI (Peripheral Component Interconnect) bus in a computer system. The PCI bus is used to connect various internal hardware components (like sound cards, network cards, and graphics cards) to the CPU. The VIA CPU to PCI Bridge driver ensures proper data flow between the CPU and devices connected via the PCI bus.

In short, it's part of the chipset driver package that helps the operating system properly interface with the system's hardware, particularly for systems using VIA chipsets.