Locking the key means you don’t have to hold Fn to access your preferred set of actions.

Some older Dell models or those running specific Dell drivers allow you to change this setting directly within Windows.

On many models, a small light on the Fn or Esc key will illuminate when the lock is active. 2. Adjust Permanent Settings in BIOS/UEFI

If you are a programmer, an Excel power user, or a gamer, you probably want the standard F-keys to be the primary input. Here is your complete guide on how to lock the function keys on a Dell laptop so they behave exactly the way you want.