The Intel i815 chipset is a family of integrated chipsets that were used in many Intel motherboards from the late 1990s to early 2000s. The chipset integrates the CPU, memory controller, and graphics onto the same silicon, which helped to reduce costs and improve overall performance in low to mid-range systems.

The Intel i815 Windows driver refers to the software that allows the operating system (Windows) to properly communicate with the i815 chipset and use its functionality, including integrated graphics, audio, and other system-level features. Without the proper drivers, the system may not work correctly, or certain features (like graphics or audio) may be disabled.