I have an HP KU-0841 keyboard which came with the tower. Everything works except the numeric keypad. NumLock doesn’t change anything (LED lights and I get a notification of the change). I went into preferences->keyboard->layout->options and enabled the numlock on/off option. No change. The keyboard is set for Generic 105 key PC (Intl). I looked for a HP-specific entry for the keyboard - nothing even close.