In the , right-click the device and select Update driver .

is a vendor-specific identifier. It typically refers to a Function Key (Fn) Button Array or a keyboard-related embedded controller found on laptops. In most documented cases, this device is tied to:

This error typically manifests with the error code "The drivers for this device are not installed (Code 28)." While Windows 10 is excellent at automatically finding drivers for most hardware, it occasionally stumbles upon proprietary components. In this article, we will demystify what the ACPI FNBT0000 device is, why the driver is missing, and provide a step-by-step guide to resolve the issue permanently.

Before diving into drivers, it is essential to understand what this device represents. The acronym breaks down into two parts: