Microsoft included a guided tour with Windows XP when the operating system launched in 2001, introducing users to its new design, user accounts and media features through on-screen demonstrations and music. As XP became one of the most widely used versions of Windows, its sounds and visuals became familiar to a whole generation of computer users. Years later, clips of the tour music began circulating in nostalgia videos and memes, where the gentle tune instantly signals the early 2000s. It remains popular because it evokes that era in just a few notes.