The ELAN HID Class Filter Driver is a software component that allows the ELAN touchpad (or other ELAN input devices) to function properly with your Windows system. ELAN is a company that manufactures touchpads and other input devices for laptops, and their drivers are often pre-installed on laptops by OEMs (Original Equipment Manufacturers) such as Acer, ASUS, Lenovo, and others.

The HID (Human Interface Device) Class Filter Driver is a specific driver that works with HID devices like touchpads, allowing your system to communicate with and control the touchpad's functions, including gestures, tapping, scrolling, and other features.