Microsoft Works 9 not working properly on Windows 7 computer

I hope that I put this in the right place. So here goes. I have two identical HP Compaq computers I bought after one computer running XP died and another computer running Vista had HD problems. My problem. I installed Microsoft Works 9 on both new computers. On one computer it works fine, but on the other computer it doesn't. Now let me see if I can explain this. When I am using the...