Microsoft may have retired Internet Explorer 6 (IE6) last week, but it's still keeping track of the ancient browser's user share on a death watch-like website that's been running for more than three years. IE6 launched in August 2001, about two months before Windows XP shipped. Microsoft issued the final security update for IE6 on April 8, when it patched two critical vulnerabilities in the browser, then retired the browser as its patron, Windows XP, also went to pasture.