How to install windows 7 before finishing the installation of windows xp?
 

I am using only thing remaining Office 2010 Sale and I am considering getting Windows 7. I have been shopping online and I have found Office 2010 Pro Product Key and Windows 7 Upgrade. When I think of an upgrade, I think of it as something to improve Office 2010 Home And Business I already have. Is this the case with Windows 7 Professional? Is it an improvement on Windows 7? If so, why hasn't the upgrade been integrated with the Windows 7 software?