Ok look my windows got messed up and I had to reinstall on but I didnt have a disk of my own so I borrowed my friends. Now I have t activate it on my comp or they won't let me use it. I got the product key from her but when i called to activate they said it couldn't be on 2 omputers at once. Fine, can anyone tell me the cheapest way to fix my problem. It is said i can get a new product key, but how and how much will it cost.