So this question is not about having num lock on by default.
Is it possible to have num lock turned on, and remove the ability of the num lock button on the keyboard to affect that state?
In my keyboard the Home button is really close to the numlock. At work I often use Home and the numpad, but sometimes I accidentally hit the numlock too. As a result my numpad gets turned off which is really sucks when I have to type a lot of numbers and after a while I realise I typed nothing because numlock turned off numpad.