As I stated the other day I would return and give the results of all the very sound advice offered me.
I downloaded the version o Win7 from Digital River that was propietory to my machine. I downloaded all the necesseary drivers for the the machine. I install al the previously mentioned software and everything went smoothly. I did not have to call Microsoft for validation and the machine is now running very well . I wish to thank the helper who gave me the directions which i followed. This problem is solved and running well.