The FI-5120C and FI-5120CDJ are document scanners made by Fujitsu, often used in professional environments for high-volume scanning. The FI-5120CDJ is a model in this series, which includes features such as automatic document feeders (ADF), duplex scanning (double-sided scanning), and support for high-resolution scanning.

The FI-5120CDJ Windows driver is the software that allows your computer to communicate with the scanner hardware. It ensures that the scanner operates correctly, recognizes paper sizes, and handles scanning tasks. Installing the correct driver enables your operating system (e.g., Windows) to properly interface with the scanner and allows you to use it for tasks like scanning documents, setting preferences, and managing the scanning process.