Microsoft released Windows XP in 2001, and its shutdown sound became one of the most familiar audio cues from early home computing, heard by millions as they switched off their PCs each day. As newer versions of Windows changed or dropped the old sounds, the jingle survived online through nostalgia videos, retro tech channels and meme edits that reuse it as shorthand for an era ending. It remains popular because it is instantly recognisable even without a picture, and because it carries a specific early-2000s feeling that modern system sounds rarely match.