Technical support and security updates for IE 8, 9 and 10 ends Tuesday coming, 12/01/16. Most IE users who are able to will probably be using IE 11 already but worth checking which version you have, and updating it if possible, if you aren't a regular IE user.
If you're still using Windows Vista then IE 9 is the latest version available for it, IE 9 should be supported on Vista until 11/04/17, which is when Vista reaches End of Life.