Keyboard shortcut not working

[John Mitchell]

Hi,
I recently had some malware on my computer and when deleting it I think I may have removed a genuine file by mistake. I am using a laptop and normally I can change the volume with Fn and + or Fn and - but now I can't. Is there any way of getting this back as it's quite handy?
John

 

[JackbNimble]

Update drivers.

 

[The_Other_One]

Try drivers or Keytweak.

 

[John Mitchell]

Sorry, I'm not that hot with computers, which is probably why I deleted this thing in the first place, how would I update the drivers? Thanks, John