Bootup Numlock State

The keypad functions as a set of directional cursor keys (arrows, Home, End, etc.) until the Num Lock key is manually pressed.

The keypad is set to input numbers immediately upon reaching the login screen. bootup numlock state

My recommendation? Enable it in BIOS, tweak the Windows registry if needed, and enjoy a login screen that actually accepts your number pad input on the first try. The keypad functions as a set of directional