Windows NT 5.0 was the internal version name for Windows 2000, released by Microsoft in 2000, and its system sounds came from the classic Windows sound scheme of that era. The chord became familiar to office and home users who heard it during system events on early 2000s PCs. As retro computer clips spread on video platforms and soundboards, the sound was kept alive as a shorthand for old Windows errors, startups and crashes, long after most people had upgraded to newer systems.