What is a USB composite device in Windows 11? In Windows 11, a USB composite device refers to a USB device that performs multiple functions using a single connection.

If you get UCM-UCSI ACPI Device Driver Error Code 43, it could be because of the driver. UCM-UCSI driver facilitates communication with USB hardware elements.

Most laptops or desktops have multiple USB ports. Unplug the device from the port you originally plugged it into, and plug it into a different port. Some older devices may not work with USB 3.0 ports.