Upgrade Microsoft Windows 8 From Windows 7 OS
Microsoft Windows 8 Operating System
Windows 8 is a new operating of Microsoft Windows series after Windows 7 operating system.
Free Version of Microsoft Windows Operating System
I am not sure, whether Microsoft allows to download new products for absolutely free of cost, but Microsoft always provides Beta version of their new products, software to implement it well. Microsoft may allow to download free version of operating system, but for that we need to wait for official announcement as because of, there are rumors going on and no body can say whether its true or not. So always wait and watch for official announcement publish on Microsoft’ Website