I have a question about the offered Windows 10 update with regard to the Windows 10 license. Is it possible for me to get the free Win 10 update for each of the four eligible computers in my house, two laptops and two desktops, as a Windows 10 licence key without having to install the OS? That is, can I get Windows 10 now while it is offered free but have the option to wait on installing Windows 10 until I want to install it on any of my computers?