Num lock doesn't work the same way with a regular keyboard? On my laptop, I don't have the number pad separate, so it's either switching my 'letter' area into a number pad using the function key to activate, which would make my letters to numbers. In his case however, it has a separate number pad section, so Num Lock not suppose to affect the letters on the keyboard. Correct me if I'm wrong though, not to familiar with those stuff.