My volume up button raises the volume by 1%. Its also not a button, it's a weird 'touch' thing which is really really terrible. If I want to lower the volume, I have to awkwardly rub it for a while. If it were to decrease by 5% or 10% it would be a lot better.

Can this be set somewhere in Windows/Keyboard settings?

I got close to a solution with Autohotkey, where I could do this:

a::Send {Volume_Up 5}

which would send the volume up command five times, however when I assign it to the volume key, it forms an endless loop since the Send command sends Volume_Up and parses it at the same time.

Update: I ended up with this script:

$Volume_Up::VolumeUp()
$Volume_Down::VolumeDown()

VolumeUp( ) {
    Send {Volume_Up 6} 
    SoundBeep, 750, 50
}
VolumeDown( ) {
    Send {Volume_Down 6} 
    SoundBeep, 750, 50 
}