The Datacolor Spyder4 is a color calibration device designed to help users calibrate their monitors for accurate color representation. It is part of the Spyder series of color calibration tools from Datacolor. The Spyder4 Windows driver refers to the software driver and associated calibration software that allows the Spyder4 hardware to function correctly on a Windows computer. The driver allows the device to communicate with the operating system, and the accompanying software helps you manage the calibration process.