Windows 10: Can't disable my fn key / lock

I accidentally enabled fn key in my hp elitebook 830 g8 laptop and I can't disable it. I tried pressing left shift fn lock + fn key multiple times but it's of no use. Due to which not a single key of my keyboard works now. Please help me solve this issue.

:)

 

FN key always on

If you press “Num Lock" (might also be labeled "Num Lk”) (I’ve also seen it labeled “Pad Lock” for numeric Pad) it turns on the blue keys, and inverts the meaning of the “Fn” key – it’s a way to use that embedded numeric keypad without having to hold down the “Fn” key the entire time. To fix it, just find and press the “Num Lock” or “Pad Lock” key again. (Note, sometimes these keys are themselves “Fn” keys, so you may, or may not, need to also hold down the “Fn” key to get the right function.) Often there is an indicator light associated with the setting.

 

FN key always on

To clarify, I was saying "Accessibility" features maybe be controlled via the BIOS, not the Fn keys. And one of the Accessibility features makes the keys "sticky". This allows folks with some disabilities to press, for example, the Ctrl key, then the Alt key, and then Del in sequence instead of all at once. Same with the Fn key. The sticky feature would let you first press the Fn key, and then the F9 key (for example) and not Fn + F9 at the same time to enable/disable whatever Fn + F9 does with that notebook (it is the touchpad on my Toshiba).

 

Laptop FN Lock?

My boss has a Sony Vaio VGN-AR190G, it seems like FN lock is on, because when he types certain letters that have numbers when pushed with the function key, it types numbers instead of letters. I do not even see a function lock key on this keyboard. I'm not really sure what to do. I've tried googling the issue but haven't come up with a solution. There was a wireless keyboard plugged into the laptop for awhile, I checked that one for a FN lock key and it doesn't have one either.