The ATI ES1000 is an integrated graphics processor (IGP) that was part of certain ATI (now AMD) chipsets, often used in business or entry-level desktop PCs, particularly in the early 2000s. It is a low-end graphics card designed to provide basic video output for tasks like office work, web browsing, and video playback.

The ATI ES1000 Windows driver is the software that allows the operating system (Windows) to communicate with the ATI ES1000 graphics hardware, ensuring proper display output and performance. Without the correct driver, the system may not recognize the graphics card, or it might not perform well, with issues like low resolution or poor image quality.