The EPSON L850 Series is an all-in-one inkjet printer, scanner, and copier designed primarily for home and small office use. It features printing, scanning, and copying capabilities, and it's equipped with a refillable ink tank system for higher volume printing at a lower cost per page.

The Windows driver for the EPSON L850 Series is software that allows your Windows operating system to communicate with the printer, enabling features such as printing, scanning, and managing print jobs. Without the appropriate driver, your computer will not recognize the printer or scanner correctly, and it won't function properly.