Windows 10: Why does pressing fn + arrow key change the windows?

I have a MSI GF63 thin laptop and I change the volume and the brightness when pressing fn + arrow key because its the keyboard factory setting and I can't change it. But today when I try to increase or decrease the volume, it instead change the windows to left or right. Can someone please help me with this?

:)

 

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).

 

FN key always on

A friend of mine daughter has an Asus Transform book that I'm interested in buying. There's only one problem: the FN key is always active. Pressing the key does not turn it off. I went into to BIOS to see if it can be disabled in the but there's no option. Is there a way to disable the key from Windows? Like a registry hack or something? It's something that I want, but the FN key is driving me crazy!

 

No effect upon pressing <fn> and a function key

Thanks for your advice.

I tried step 1 - Windows returned "No changes or updates were necessary."

I tried step 2 - There is still no effect caused by pressing <fn> and the function keys.