Windows 10: why my F1,F2 and F3 is not working and it was under volume up/volume down and mute button

It is not responding well and is not working properly

:)

 

my dell laptop with windows 10 has keyboard buttons not working , esc , F1 F2 and others numerics not working

I have installed windows 1o home edition , I have now problem with my keyboard buttons , the keys F1 , F2 , esc and other some of numeric numbers are not working . when I press F1plusF2plusF3 then caps lock light turns on and when I press again then
it turns off . actually My F1 , F2 , F3 buttons are made for sound volume , F1 worked for mute , F2 for decrease the system volume and F3 for increase volume , the button F3 works correctly but F2 and F1 don't work , also escape button doesn't work , I thing
these buttons are functionally disabled , because when I press the three keys at same time then the caps lock light glows , I think it is not hardware problem . thanks in advance for solution.

 

How to make the F1, F2 and F3 keys no longer control volume.

I usually use the F1, F2 and F3 keys a lot in certain programs but recently after a Windows update that occurred while I was using my computer a few days ago, these keys are now set to Mute, Volume Up and Volume Down. I was wondering how I can disable
these so that they have regular functions again. I can find answers for Mac online but nothing for Windows, I've tried searching in the community here too. Thanks so much for your help! ;D

 

F1 F2 F3 not a single is working

My f1 f2 f3 f4 f5 f6 f7 f8 f9 f10 f11 f12 any of these keys is not working. My laptop had windows 7 professional but I upgraded to Windows 10 using Media Creation Tool. Please suggest some solutions.