For most users, the shortcut is the hero you needed. It instantly toggles the lock without rebooting. If you want a "set it and forget it" solution, dive into the BIOS once and change the default behavior.
If you are tired of holding down the Fn key every time you want to press F2 , this guide is for you. Here is how to flip the script and enable standard function keys on your Dell laptop. how to enable function key in dell laptop