Windows Millennium Edition, released by Microsoft in 2000, was the short-lived successor to Windows 98 and the last system built on the older DOS-based Windows line. Its startup sound played every time the computer booted, becoming a familiar cue for a generation of home PC users. Long after support ended, the chime survived on soundboards, retro computing videos, and social media edits, where it now signals nostalgia for turn-of-the-millennium technology rather than a working operating system.