Visit your manufacturer’s support page (e.g., HP , ASUS , or Lenovo ) and download the latest BIOS update for your specific model.
In Device Manager , right-click the "Unknown Device," select Update driver , and choose Search automatically . If that fails, download the driver from the manufacturer and use Browse my computer for drivers . 2. Update System BIOS/UEFI acpi fnbt0000 driver fix
Download the Lenovo Power Management Driver or Lenovo ACPI Driver directly from the official support site. Visit your manufacturer’s support page (e
Ensure your laptop is plugged into power during the update to prevent system failure. 3. Reset Power and BIOS Settings Visit your manufacturer’s support page (e.g.