Microsoft introduced this startup chime with Windows 7 in 2009, and a version of it carried into Windows 8 and 8.1, where it was disabled by default. The four-note melody played as the login screen appeared, becoming the soundtrack of school computer labs and home PCs for years. As those machines aged out, the chime lived on in nostalgia edits, vaporwave mixes and retro tech compilations, where a half-second of audio signals the late 2000s. It sits alongside other iconic system sounds such as the classic notification ding and the familiar error tone.