The ALi PCI to USB Enhanced Host Controller is a hardware component that enables your computer to manage and support USB (Universal Serial Bus) devices through a PCI (Peripheral Component Interconnect) slot. This controller allows your system to connect and communicate with various USB devices, such as external drives, printers, and peripherals, at enhanced speeds, especially for USB 2.0 or later standards.

The Windows driver for this controller ensures that it works properly with your computer's operating system, allowing for the seamless use of connected USB devices. The driver typically provides support for USB 2.0 or 3.0 speeds, depending on your system.