Rainbow USB SuperPro Windows Driver refers to the software drivers needed to enable communication between a USB-based hardware dongle (typically used for software licensing or protection) and a Windows computer. The Rainbow USB SuperPro dongle is often used in scenarios where software vendors want to prevent unauthorized usage by requiring a physical USB dongle to be plugged into the computer while the software is running. These dongles are part of the Rainbow Technologies (now a part of Thales) family of software protection solutions.