You can Lock and Unlock Function (Fn) key in Windows 11/10 in either of two ways: On the Keyboard In BIOS/UEFI Settings Let’s see how to turn off Fn Lock on your Windows computer now in detail..

If the notification shade is open, tap the Settings icon and then select Home screen from the list of options. Tap the toggle next to Lock Home screen layout to clear it (off means it's unlocked).