Without this driver, your computer may show a yellow exclamation mark in the Device Manager under "Other Devices". How to Fix the Missing Driver
Try these solutions in order—most users will resolve the issue by Step 2. acpi fnbt0000 driver fix
When this driver is missing, Windows knows something is there, but it doesn't know how to talk to it, hence the "Unknown Device" status. Without this driver, your computer may show a
Provide your support technician with the Hardware ID you retrieved in Method 4. For example: Without this driver
Open , right-click the Unknown Device , and select Update driver .