The Microsoft Support Lifecycle policy provides a minimum of five years of Mainstream Support and a minimum of five years of Extended Support for Business and Developer products, and the Windows operating system.
The newest Internet Explorer offers improved security, increased performance, better backward compatibility, and support for the modern technologies 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.
Beginning January 12, 2016, only the most current version of Internet Explorer available for a supported operating system will receive technical support and security updates. This means that support for Internet Explorer 8 will cease from this date. For more details