If you’ve recently ventured into the Device Manager on your Windows 10 PC—perhaps to fix an unrelated driver issue—you may have stumbled upon a mysterious entry labeled ACPI FNBT0000\0 sporting a yellow warning triangle. Alternatively, you might be here because you searched for a driver update for this exact hardware ID after noticing system instability, battery reporting issues, or function key problems.
Now go ahead, open Device Manager, and conquer that yellow exclamation mark once and for all. This guide was last updated for Windows 10 versions 21H2 and 22H2. For further assistance, visit your laptop manufacturer’s community forums and search for “ACPI FNBT0000” – you’ll find many users with the same experience. acpi fnbt0000 0 driver windows 10