Hello guys! I want to make a bootcamp install of windows 7 on my macbook pro. I have a windows 7 dvd from my brother's pc. I can install windows from this dvd but i need a product key. I am also a student and microsoft provides me a free download of windows with a product key. My question is: do i have to download it in order to use this product key or can i install from dvd and after use this key? My internet speed is too slow so it really matters for me Please help.