The Garmin USB GPS Windows driver is a software component that allows your Windows computer to communicate with Garmin GPS devices via a USB connection. Garmin GPS devices, such as handheld units, automotive navigators, or marine devices, can be connected to a computer using a USB cable, and the driver ensures that the GPS data (such as coordinates, waypoints, and routes) can be transferred between the device and your computer.
Here's a more detailed explanation of what the Garmin USB GPS Windows driver is and how to install it: