Windows XP debuted in October of 2001, quickly became the most popular operating system in the world, and when its successor Vista bombed XP became a trusted workhorse. So much so that users have stubbornly refused to give up on it, even as Microsoft withdraws support for it, making the operating system a serious security threat. While it may have outlived its time XP has made its mark. Here’s a short quiz about Windows XP and its long life. Keep track of your answers to see how well you did at the end.