Well looking at the situation which you have provided I recommend that you need to use following thing to meet your requirement. You have to launch the Notepad and copy paste the following code on the Notepad.
You need to save that particular file with the “numlock.vbs” including double quotes. Now copy that file to user startup folder which is located at the user profile path. The default path can be stated as Documents and Settings\All Users\Start Menu\Programs\Startup.
set WshShell = CreateObject("WScript.Shell")