Windows 8.1 is the free upgrade to all Windows 8 users, but you usually cannot install Windows 8.1 along with a Windows 8 product key. Fortunately, you can get around this limitation if you actually want a new install of Windows 8.1. Microsoft permits you to in downloading the Windows 8.1 installation media along with a valid Windows 8 product key. There are various steps available to install the Windows 8.1. However, the Windows 8 and 8.1 installation procedures are nearly same. But knowing the exact method will help you a lot. download Windows 8.1 product key so that you get access to another trick.