Problem: Numeric keypad is set on, some letters are not showing only numbers instead of letters (for example M=0, J=1, K=2 L=3 etc)
To enable or disable the numeric keypad, press and hold SHIFT and then press NUMLK (SCRLK).
To enable full keyboard to work from start up:
Change the value for InitialKeyboardIndicators from 2 to 0
On laptop Asus A9T it helped to enter number 3 in registry (instead of 0)