The OKI B431 (PCL XPS) Windows driver is a printer driver specifically designed for the OKI B431 series of printers. This driver enables your computer to communicate with the printer, allowing you to send print jobs, manage print settings, and use advanced features such as duplex printing, color options, and more.

The "PCL XPS" part refers to the type of driver used. PCL (Printer Command Language) is a page description language commonly used for controlling printers, while XPS (XML Paper Specification) is a file format developed by Microsoft for representing documents in a way that preserves their appearance across different systems.

In the case of OKI B431, you are likely dealing with a driver that supports both PCL and XPS printing, providing more flexible and high-quality printing options, particularly in environments that require efficient handling of print jobs, especially in Windows environments.