The ELAN WBF (Windows Biometric Framework) Fingerprint Sensor driver is a software component that allows your computer to interact with a fingerprint sensor provided by ELAN Microelectronics. ELAN's fingerprint sensor is used for biometric authentication, which is typically integrated into laptops, desktops, or external devices for security purposes. The driver enables Windows to recognize and communicate with the fingerprint sensor, allowing you to use it for things like logging into Windows, verifying identity, and other security functions.