Check the laptop BIOS/UEFI settings
Find the Function Key Behavior or Action Keys Mode option
Set it to Disabled, Function Key, or Legacy Function Key mode
Save changes and restart the laptop
Use the Fn Lock key combination if available
Press Fn + Esc to toggle Fn Lock on some laptops
Press Fn + Caps Lock on some models
Use the manufacturer keyboard utility if installed
Open the keyboard settings in the laptop control app
Disable hotkey mode or action key mode
Update or reinstall the keyboard driver if the setting is missing
Check the laptop manual for the exact key combination or BIOS option