Some computers let you control the "Num Lock" settings in the computer's BIOS. However. for people who are not familiar with the BIOS settings, you can also set the num lock permanently by using the Windows registry. The Windows registry has a setting that will turn on the num lock key each time Windows loads. This value overrides the BIOS settings, so the num lock key is turned on regardless of BIOS settings.
Click the Windows "Start" button. Type "regedit" in the search text box in the main menu. Press "Enter" to open your registry editor.
Navigate to the "HKEY_CURRENT_USER \ Control Panel \ Keyboard" directory in the Windows registry editor.
Double-click the key value named "InitialKeyboardIndicators" to open a dialog box where you can change the value.
Type "2" in the value text box and press "OK" to change your settings. Reboot your computer to test the settings. Notice your num lock automatically enables.