A USB to Serial Cable is a type of adapter that allows you to connect devices with a serial (RS-232) interface, such as older printers, GPS devices, or industrial equipment, to a computer that only has USB ports. The adapter typically contains a small chip (often a Prolific or FTDI chip) that converts USB signals to the serial signals required by these older devices.
To use a USB to Serial Cable with Windows, you need the appropriate driver installed so that your computer can communicate with the device via the serial port. Here's a breakdown of what the driver does and how to install it: