Are you saying your brother has
microsoft office pro 2010 product key disc and doing. Student Edition and you want to buy another license for that software? It's possible Microsoft will sell you a 2d license for the same
windows 7 home premium serial key, but not likely. However you can contact Microsoft directly and ask them if they will do that. But you are really just paying for the software a second time....so you may as well just go buy the
office 2010 Home And Student serial again so you can get the license (the license is the product key).