Windows 10: I have to press Fn key to change volume

I have this problem on my old Lenovo and 2024 Acer laptop. When changing my sound, brightness, mute, etc., I have to press my Fn key. I have already tried esc+Fn and that didn't fix it I have also gone to the Windows Mobility Center and it has no option to fix my problem. How do I fix this

:)

 

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.

 

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 keys

Let us try this. Some laptop models allow us to disable/enable Fn key by holding Fn key and press Esc.

So that, the volume and brightness can be changed without/with Fn key. Fn can be locked by Fn+Esc → volume and brightness can be changed without Fn key.