The sound comes from Microsoft Windows XP, released in 2001, where it was assigned to the Critical Stop event and played alongside error message boxes. As XP became the most widely used desktop system of its decade, the chime became familiar to millions at home, school and work. Clips, tutorials and parodies later carried it onto YouTube and into meme editing, where editors detached it from the operating system entirely. It now sits alongside other classic error sounds as shorthand for a computer saying no, and it remains instantly recognisable decades later.