What is the difference when buying windows 7 from upgrade and full?
 

I just want to know how windows 7 64 bit can I format my laptop windows 7 activation key, so that the only Office Professional Plus 2007 thing remaining is the Microsoft Office 2007 itself, as if I have just bought Office 2010 Key. I don't have any Microsoft Office 2010 installation CD's, because Office Professional Plus 2010 Key came with the laptop, so how can I do that?