What do you mean by Windows7?
Windows 7 is an operating system developed by Microsoft (Microsoft) with the core version number of Windows NT 6.1. Windows 7 can be used for home and business work environments, laptops, tablets, multimedia centers, and more. July 14, 2009 windows 7 RTM (build 7600.16385) officially online, October 22, 2009 Microsoft in the United States officially released Windows 7. Windows 7 also publishes the server version--windows servers 2008 R2. In the early hours of February 23, 2011, Microsoft officially released the Windows7 upgrade patch--windows 7 SP1 (build7601.17514.101119-1850) to VW users, and also included Windows Server 2008 R2 SP1 upgrade patch.
Second, the Windows version
In the market, Windows7 has many versions, which are divided into: Windows7 simple version, Windows7 family, Windows7 Family Advanced Edition, Windows7 Professional Edition, Windows7 Enterprise Edition, Windows7 flagship edition, Windows7 Ballmer signed the edition. These versions have a different style and a different price, you can refer to the official Windows website for enquiries.