If you want the NumLock key to be enabled automatically for every user, click on the button Start, click on the word Run and then type the keyword Regedit. Go the following directory: HKEY_CURRENT_USER\Control Panel\Keyboard\InitialKeyboardIndicators. Once you are there, the value should be changed from 0 to 2. Enable NumLock manually. After this, you have to log off the computer and then log in again. You should do this procedure for all users of your computer. For this change to take effect, there is no need to restart your computer, as you are logging off a user account each time.