My daughter has a 2 year old HP laptop that has finally gotten to where it wouldn't work right. Last night, I did a complete reinstall of the XP Pro disk. I entered the key code at the registration window, but it tells me that the key code is incorrect. I am looking at it and typing it exactly as it appears. Any ideas as to how to get this code to go so I can use the program?? It says there is only 29 days left.