Microsoft: "Support for older versions of Internet Explorer ended on January 12th, 2016"

As of January 12, 2016, only the most current version of Internet Explorer (Internet Explorer 11) will receive technical support and security updates by Microsoft. Internet Explorer 11 offers improved security, increased performance, better backward compatibility, and support for the web standards that power today's websites and services. Microsoft encourages customers to upgrade and stay up-to-date on the latest browser for a faster, more secure browsing experience.

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