Before you try again on a different 
computer, I'm pretty sure you can go to Microsoft's website (while you're in XP), and download a little app that will check your 
computer to see if it is able to install 
Windows 7. Another FYI... after you install 
Windows 7, if your hardware is compatible, you can download a free app that let's you run a virtual 
Windows XP on 
Windows 7 if you were having issues running any older XP apps on 7. 
