I got a HP Elitebook laptop recently and initially I found it difficult using the function keys.
There is an option to lock the function key and you can use the functions by simply pressing the keys. Here is how you can do it.
Hold the function key and press Shift key above the function key. If you see the light glowing on the fn key, You can hit the fn keys directly to use the functions. To turn of you can follow the same process.
