Windows 7 is an operating system of Windows NT family which was released after Windows Vista but before Windows 8. According to the data on summer of 2017, Windows 7 is the most popular operating system in the world. According to the data on July, 2017, Windows 7 is used on 48.91% of all PCs worldwide. This OS went on sale on October, 22nd, 2009, it’s less than 3 years later after the failed Windows Vista release. The installation images of the final system version were available in the Internet since July 21st, the same year. You can download the latest up-to-date drivers for Windows 7 here.