[–] TheGreatNico ago
Because, unless you have a very unusual keyboard, like an IBM Model K, you'll have directional keys as well as a keypad, so you don't need to use the secondary ten key functions. Keeping it is just a holdover from times past, like the pause/break and scroll lock keys: useless for the overwhelming majority of users.
[–] Mr_Wolf ago
Mine boots however I left it.