So i have a question about moving your OS to a different drive. As for example I ask this because a friend of mine is upgrading is whole PC but windows 7 is on his 1TB Drive instead of the SSD he is purchasing. Would I be able to use the install disc to be re-download windows to the new SSD? or is there a simpler way to transfer windows to the SSD? Would i have to buy a new copy of windows if i wanted to re-install because the previous key would have already been used on the HDD?