Okay I have one thing to add about the student edition, at least the one nugget is talking about. Usually the one you get from a school is an upgrade copy only. You can get the full version of the OS for a reduced price, but its like $129 I think. The upgrade copy won't work unless you have a previous version of windows or something
also about that torrent, i would not download that one. While windows 7 pro x64 is what you want, that specific torrent has only two seeders, and is relatively new. I would look for one that is from a premium member, has a lot of seeders, and most importantly a lot of positive comments. You will fuck up so badly if you don't read the comments.