The FC - Application Interface Windows Driver typically refers to a driver for Fibre Channel (FC) devices that facilitates communication between the operating system and Fibre Channel hardware on a Windows system. Fibre Channel is a high-speed network technology commonly used in data centers, primarily for storage area networks (SANs). The driver enables the computer to connect to and communicate with storage devices or network switches using the Fibre Channel protocol.

This specific "Application Interface" driver might be part of a broader software package provided by the manufacturer of the Fibre Channel Host Bus Adapter (HBA) or storage network equipment. The "application interface" aspect refers to the APIs and tools it exposes for software running on the operating system to interact with the Fibre Channel device and associated SAN.