In Device Manager, right-click the ACPI\FNBT0000 unknown device, select > Browse my computer for drivers .
Here are some common questions and steps you can take to prevent this from happening again: acpi fnbt0000 driver fix
Look for the version that matches your OS (e.g., Windows 10 or Windows 8.1). In Device Manager
Download the version corresponding to your specific Windows architecture (64-bit). Run the installer package as an Administrator. right-click the ACPI\FNBT0000 unknown device
Warning: Ensure your computer does not lose power during a BIOS update, as this can corrupt the motherboard firmware. Summary of Fixes Target Component Success Rate Fintek System Microchip Device Manager Manual INF Install Specific ACPI ID matching Medium-High Windows Optional Updates Microsoft Driver Catalog BIOS Update ACPI Table Synchronization Low-Medium