Windows 7 is an operating system developed by Microsoft that is compatible with a wide range of personal computers, including home and business desktops, laptops, netbooks, tablet computers, and media center PCs.
On October 22, 2009, less than three years after its predecessor, Windows Vista, was released to manufacturing, it became generally available for retail worldwide.
By Microsoft, Windows 7 is given as a trial version having some of the basic usability and features. To get full features and future Windows Updates (Update to Windows 8, 8.1, 10) and to get free apps (i.e. Candy Crush, Bat Pro Email, Gmail, Facebook Messenger), we have to buy a WINDOWS 7 PRODUCT KEY which has a considerable price.