Windows 10: I keep having to press Alt + Fn to use function keys

I know this might sound very simple but i wasnt able to find any solutionafter formating my laptop i had to press alt + fn instead of just fn to use f keys and it's really annoying so if someone knows the solution please let me know.laptop specs in the picture

:)

 

No effect upon pressing <fn> and a function key

I have an ASUS laptop, K52JC, it used to perform certain function when combination of <fn> key and a function key are pressed simultaneously. For example -

• Pressing <fn> and <F10> simultaneously will mute the sound
  
• Pressing <fn> and <F11> simultaneously will decrease the volume
  
• Pressing <fn> and <F12> simultaneously will increase the volume, and so forth
  

I have its Windows 10 re-installed recently. Everything works fine after the installation, except when combination of <fn> key and a function key are pressed simultaneously, no effect seems to be generated, as the computer does not respond accordingly.

Please advise how to resolve the above problem.

 

Problem with FN key


I recently bought a Toshiba laptop and immediately upgraded to Windows 10.
My FN key is acting as if it is ALWAYS pressed. I can use the F1-F12 buttons for their alternate functions WITHOUT having to press the FN key (ex. I can increase/decrease brightness without pressing the FN key). I want to reverse this, as this current setup denies my use of certain keystrokes such as ALT+F4, requiring me to press ALT+FN+F4.

I guess there is a way to switch the way the FN key works, but I don't know it.
Thank you for your help.

 

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).