Beginning January 12, 2016, only the most current version of Internet Explorer available for a supported operating system will receive technical supports and security updates.

Internet Explorer 11 is the last version of Internet Explorer, and will continue to receive security updates, compatibility fixes, and technical support on Windows 7, Windows 8.1, and Windows 10.

https://www.microsoft.com/en-us/WindowsForBusiness/End-of-IE-support