I have 2 computers...the one I use for school is running WinXP, which I recently reinstalled with its factory CDs. The other one I use for work and it runs Win7Pro, which I have all the factory reinstall CDs for as well. I'm taking an online course that requires me to install an academic subscription of Win Office 365 but WinXP does not support that program. My question is this: can I use the factory reinstall CDs from the computer with Win7Pro to clean install that OS onto the computer currently running WinXP? If not, why? If so, is there something special I'll need to do? Will I need to use the Win product key from the other computer when installing or will that not work? I would like to use Win7Pro instead of XP anyway, and I don't use the other computer for schoolwork, so I don't want to have to download the Office software on it and use 2 computers to do my coursework.