: This bug was officially patched in the kernel in 2012. In commit 0ece8d5 , developer Miguel Gómez changed the driver's CMPC_KEYS_HID define from "FnBT0000" to the correct "FNBT0000" .
Locate the device with the yellow exclamation mark (usually under "Other devices" or "Unknown devices"). Right-click and select Update driver . Choose Search automatically for drivers .
Windows will rescan the ACPI namespace and attempt to reinstall the driver automatically. In many cases, this resolves transient errors.
If you are running Windows 10 or 11 on an older CF-19 or CF-30, Panasonic may not list a driver for your OS. In this case, download the Windows 7 version
Windows built-in OSK (On-Screen Keyboard) lacks media keys, but third-party tools like include brightness/volume controls.
We recommend this way to download app, because it has less change to your current Apple ID.
Before you update your location, you must spend your store credit, cancel your subscriptions, and get a payment method for your new country or region.
For more details, please refer this url:
https://support.apple.com/en-us/HT201389