The VIAS3G UniChrome IGP (Integrated Graphics Processor) is a graphics card or integrated graphics solution developed by VIA Technologies. It is part of the VIA S3G UniChrome series and is typically used in low-power systems, embedded platforms, or budget desktop systems. The UniChrome IGP was common in older computers or in systems that do not require high-end graphics capabilities.

The Windows driver for the VIA S3G UniChrome IGP allows the Windows operating system to recognize and work with the graphics hardware to render images, run graphical applications, and provide the user interface for basic visual tasks such as desktop management, video playback, and games. Without this driver, Windows might default to using basic display settings or fail to provide full functionality for the graphics hardware.