Keep NUMLOCK enabled by default

1. Open Regedit.

2. (OPTIONAL) If you want to make the change on a remote computer, navigate to "File > Connect Network Registry." Enter the GB number and hit "Enter."

3. Navigate to HKEY_USERS\.Default\Control Panel\Keyboard

4. Change the value for InitialKeyboardIndicators from 0 to 2.

screenshot of registry editor

5. Hit Ctrl-F and look for all entries of 'InitialKeyboardIndicators' - there should be five.  Change their values to 2. 

screenshot of registry editor with find tab open

6. Have the user log off or restart and you should see the NumLock enabled by default.