Windows XP was released by Microsoft in 2001 and became one of the most widely used desktop operating systems of its era. Its built in tour was designed to introduce features to first time users, and its opening music became familiar to anyone who explored a new PC in the 2000s. As XP aged, clips and sounds from it moved into retro computing videos and meme edits online, where they now signal nostalgia, old software and simpler internet era technology rather than a real product demonstration.