Eh? IE9 isn't the latest version available for any version of Windows. 8 is the latest for XP/Vista 11 is the latest for 7/8/8.1 9 is still popular because

Eh? IE9 isn't the latest version available for any version of Windows. 8 is the latest for XP/Vista 11 is the latest for 7/8/8.1 9 is still popular because not everybody upgrades browsers, but giving users who don't upgrade browsers a new option is unlikely to be helpful. Communicating to them that IE is going away and that they should upgrade to a modern browser, "Spartan" or otherwise, would possibly help this situation, as the author suggests.