The High-Speed USB MultiSerial Compound Device driver is typically used for USB devices that present multiple serial interfaces over a single USB connection. This driver is commonly associated with USB-to-serial adapters, multi-port USB hubs, or other USB devices that support multiple serial communication channels. These devices allow multiple serial (COM) ports to be available through a single USB port on your computer.

The "High-Speed USB MultiSerial Compound Device" driver enables the operating system to manage and interact with these multi-serial USB devices, providing the necessary functionality to access each serial port individually.