: If missing, you may see an "Unknown Device" in Device Manager, or your keyboard's "Fn" hotkeys for wireless settings may not respond. www.facebook.com How to Install/Update the Driver Microsoft Update Catalog
: The "HID" designation means it handles user-interactive components, such as specific hotkeys or chassis buttons, allowing them to communicate directly with the Windows power management system. Acpi Fnbt0000 Driver
The term stands for Advanced Configuration and Power Interface . It is an industry standard that allows the operating system to communicate with hardware components to manage power consumption and "special" hardware features. : If missing, you may see an "Unknown