Windows XP launched in 2001 as Microsoft's mainstream operating system, and its default sound scheme became familiar to a generation of home and school computer users. The shutdown chime was heard daily at logoff, paired with the green hill desktop and blue taskbar that defined the era. As XP was retired and clips moved to YouTube, TikTok and soundboards, the sound survived as shorthand for old computers. It is now reused far from any real PC, as a nostalgic punchline for endings, crashes and people switching off.