Microsoft released Windows XP in 2001, and its set of system sounds quickly became part of everyday computer life for millions of users around the world. The shutdown jingle was the sound heard at the end of every session, before the familiar blue screen confirmed the machine was turning off. As XP was replaced by newer versions, the sound survived online through nostalgia videos, retro computing channels and meme edits that use it as a punchline for something ending. Its short, polite tone still makes it instantly recognisable decades later.