Is it possible to have Num Lock ALWAYS ON, without the ability of the Num Lock key to turn off?
Solution 1:
I use CapShift and it's free:
https://www.donationcoder.com/Software/Skrommel/index.html#CAPshift
"CAPshift extends the Caps Lock key by slowing it down...
- Hold down for 0.5 sec to enable/disable.
- Hold down for 1 sec to show the menu.
- Rightclick the tray icon to show the menu.
- Also slows down F1, Insert, NumLock and ScrollLock."
The Advantage is: You don't lose the ability to change NumLock if you really need to.
Solution 2:
Physically remove the NumLock key. When your finger goes to press it, it won't be there.