Windows Longhorn was the development codename used by Microsoft in the early 2000s for the project that was reset and later released as Windows Vista in 2007. Many of its proposed sounds and visuals were shared online by enthusiasts, and fan-made recreations soon followed. This fake shutdown version spread through soundboards and meme edits as a nostalgic alternative to a typical error sound, loved by people who collect retro operating system chimes and enjoy pretending modern computers run an unreleased system.