Windows Longhorn was Microsoft's development codename for the operating system eventually released as Windows Vista. During its development, preview builds, concept interfaces, and abandoned features attracted lasting interest from Windows enthusiasts. This particular startup clip is identified as fake, so it should be understood as a community-created interpretation rather than an authentic system sound. Similar imagined boot chimes circulate through operating-system concept videos, retro computing edits, and fan demonstrations because they help complete the illusion of a usable alternate version of Windows.