Disable Num Lock

This registry edit controls whether Numlock is enabled or disabled when you login to Windows.
-
Launch Registry Editor
(Start > Search: regedit > press [Enter]) -
Go to the registry key:
HKEY_USERS\.Default\Control Panel\Keyboard
-
Change the value of InitialKeyboardIndicators:
Set it to 0 to set NumLock to OFF
Set it to 2 to set NumLock to ON
References
Enable/Disable Numlock at Login or Startup
http://www.technipages.com/enabledisable-numlock-at-login-or-startup.html