Acpi Fnbt0000 Driver [new]

On 2-in-1 Yoga laptops, the driver helps detect when the screen rotates past 180 degrees to disable the keyboard and enable tablet mode. A missing driver often leads to a keyboard that stays active while the device is folded.

Follow these proven methods to resolve the missing driver error in Windows 10 and Windows 11.

LED lights for caps lock, power, or charging. Why is it Showing as an "Unknown Device"? Acpi Fnbt0000 Driver

While the Acpi Fnbt0000 Driver is generally reliable, users may encounter issues from time to time. Here are some common problems and their solutions:

With the ACPI Fnbt0000 Driver installed, Emily's productivity soared. She could now easily adjust her screen brightness, volume, and other functions without having to navigate through menus. The driver also improved her overall laptop experience, allowing her to focus on her studies and projects. On 2-in-1 Yoga laptops, the driver helps detect

Because Fnbt0000 is tied to proprietary software, generic Windows drivers rarely fix it entirely. You need to know who manufactured your motherboard or laptop. Press Windows Key + R , type msinfo32 , and hit . Look at the System Manufacturer and System Model lines.

Function (Fn) keys for brightness, volume, and Wi-Fi toggles. LED lights for caps lock, power, or charging

Instead, you will see a newly named device under or Human Interface Devices (HID) , such as "Lenovo PM Service" or "HP Mobile Data Protection Sensor" . Test your laptop's Fn keys to ensure full functionality has been restored.

The hardware ID frequently appears in Windows Device Manager, often accompanied by a yellow exclamation mark. This identifier points to a specific Advanced Configuration and Power Interface (ACPI) device embedded in your computer's motherboard.

Last updated: October 2025. Covers Windows 10, Windows 11, and Windows Server (if ACPI is supported).