You aren’t doing anything wrong. You’ve just run headfirst into one of the most common modern computing annoyances: the "Hotkey" vs. "Function Key" battle.
If you’ve just bought a new Dell laptop or noticed that your F1–F12 keys are controlling volume, brightness, or media playback instead of performing their standard commands (like F5 for refresh or F2 for rename), you are not alone. how to enable function key in dell laptop
Your computer will reboot, and your keyboard will now default to the traditional F1-F12 keys. You aren’t doing anything wrong
If the shortcut didn't work, or if you want the change to persist even after reinstalling Windows, change it directly in the system firmware. how to enable function key in dell laptop