I currently have Windows 7 64bit and would like to play the new Forza game but I need Windows 10 for that. So looking to buy a copy of Win 10 for cheap.
Install Windows 10 > During install process say you do not have a key > once installed and setup > you can click the change key option and enter in your Windows 7 key assuming its legit and Windows 10 will activate with no problems.
If you have Win 7 Pro install Win 10 Pro etc.