The startup chime comes from Windows XP, Microsoft's operating system released in 2001, and it played every time the system finished booting. Because XP remained widely used in homes, schools and offices for many years, the short melody became one of the most familiar computer sounds in the world. Online, it survived as a shorthand for the early 2000s, appearing in nostalgia videos, remixes and parody edits. Versions like this one keep the opening recognisable while adding a surprise, which is why the sound still works as an instant retro cue.