Windows Longhorn was the development codename for what became Windows Vista, and sounds labelled with that name circulate on soundboards as short retro system tones from that era. Creators rediscovered them through nostalgia edits, tech history videos and meme pages celebrating early 2000s computing, where a few seconds of a familiar boot chime instantly sets the period. Its continued use comes from that instant recognition, rather than from any new release or viral trend.