In the previous post, Microsoft has announced they will offering the free upgrade from Windows 7, Windows 8/8.1 and Windows Phone 8.1 to Windows 10 and it seems good news at the moment.
However, the Windows 7 and Windows 8/8.1 Enterprise users aren’t getting this free upgrade, according to Jim Alkove, General Manager of Security of Microsoft. It was surprising to hear Microsoft offer a free upgrade, but limited to a part of customers.
The Windows 10 upgrade will be free for a period of time after the final version released for existing Windows users. And after that time, you will be charged for any upgrade from any old version to Windows 10.