The Canon D500 Series UFRII LT Windows Driver is a software package developed by Canon for the Canon imageRUNNER 5000 series of printers and multifunction devices. UFRII LT stands for Ultra Fast Rendering II Lite, a printer language and protocol developed by Canon to improve the printing speed and efficiency, particularly for Windows-based environments.

The UFRII LT driver allows Windows computers to communicate with the Canon D500 series printers, enabling them to perform tasks like printing, scanning, and other multifunctional operations. The "Lite" version is a streamlined, more basic version of the full UFRII driver, designed for environments that don't require the full suite of features but still need efficient printing.