This week marks the halfway point of Windows 7's decade-long support stretch, which ends Jan. 14, 2020.
The world's most popular personal computer operating system exits mainstream support on Tuesday, Jan. 13. After that, although Microsoft will continue to issue security updates to all users for another five years, it will not add new features to Windows 7, and any non-security fixes -- such as reliability and stability updates -- will be issued only to organizations that have signed support contracts.
http://www.computerworld.com/article/2867031/windows-7-hits-mid-life-but-no-crisis-yet.html