Windows 10 also Guide for Users Gallery

Windows 10 is scheduled to go on sale around the middle of 2015. When it is available later, this new operating system will be obtained free of charge by the owner of a computer operating system based on the previous version, ie Windows 7, Windows 8, and Windows 8.1.
Upgrade for free, according to information gathered by Kompas Tekno by Reuters on Wednesday (03/18/2015), applicable to all owners of versions of Windows on top, both original and pirated.
"We were offered an upgrade to all PC owners who qualify, either original or not, to Windows 10," said Chief of the Division of Microsoft Operating System, Terry Myerson.
According to him, Microsoft's move is partly done to reduce the number of Windwos use pirated in China, a country that is home to hundreds of millions of Windows-based computers.
Despite the large number, only a few computers in the Bamboo Curtain country that is running the original software. A total of approximately three-quarters of them do not use the licensed software.
Microsoft's Windows operating system eliminate 10 to maintain the Windows user base that already exist today. To replace the lost revenue from sales of Windows, Microsoft will sell services such as Office applications via the Internet.
In China, Microsoft is working with a number of partners such as Lenovo, Qihoo 360 Technology, and Tencent to encourage the adoption of Windows 10 when it slid later.
Microsoft is also working with the Xiaomi to provide trial versions of Windows 10 in products smartphone from the Android device manufacturers.

Source : Kompas