Expand (if available), look under "Driver Updates," and select any driver related to your device manufacturer (Lenovo, Synaptics, etc.). Method 2: Manually Reinstall via Device Manager If Windows Update fails, you can try forcing a re-scan. Right-click the Start button and select Device Manager .
Before applying fixes, confirm that your "Unknown Device" matches this specific hardware ID: Press and select Device Manager . Expand the Other devices section. Right-click the Unknown device and select Properties . Navigate to the Details tab. Click the Property dropdown menu and select Hardware Ids .
methods in the DSDT) to HID usage codes for the "Wireless Radio Toggle." Microsoft Update Catalog 5. Conclusion
Because this is a proprietary ACPI device, generic driver updater tools or Windows Update will rarely find the correct file. The definitive solution is installing the Lenovo Energy Management software tailored for your machine. Method A: Use Lenovo Vantage acpi fnbt0000 driver fix
Some users report success by:
System instability when the BIOS attempts to send a radio event to a non-existent driver.
Handling specific quick-launch buttons or tablet-to-laptop transition sensors. Expand (if available), look under "Driver Updates," and
To help find the exact driver package for your specific laptop model, let me know: What is the of your laptop? Which version of Windows are you currently running?
Enter your laptop's specific or model name (e.g., IdeaPad Z570, G570).
To fix the driver issue, which typically appears as an "Unknown Device" in Device Manager, you need to install the Airplane Mode HID Mini-driver or Virtual Keyboard Device driver . This hardware ID is most commonly associated with Intel-powered Classmate PCs and certain rugged laptops from manufacturers like Gigabyte, Noblex, and Exo. Step 1: Identify and Uninstall the Faulty Device Before applying fixes, confirm that your "Unknown Device"
Did this error show up right after a ?
Windows will scan the folder, match the INF file to the hardware ID, and complete the installation. Step 4: Update the System BIOS/UEFI
If the driver installation does not work, the issue may be in how the BIOS communicates with Windows. 1. Perform a Power Drain (Hard Reset) Sometimes the ACPI table is loaded incorrectly. Shut down your laptop completely. Unplug the power cable. If your laptop has a removable battery, remove it. . Reconnect everything and turn on your laptop. 2. Update BIOS
Enter your laptop's serial number to find its specific download page.