Windows XP was released by Microsoft in 2001 and became one of the most widely used operating systems of its era, so its startup and shutdown sounds were heard in homes, schools and offices around the world. The shutdown jingle was designed to feel polite and reassuring rather than abrupt, giving users a clear audio cue that the system had closed safely. As XP machines were retired, the sound survived online through nostalgia videos, memes and soundboards, where it now marks endings, farewells and the close of an internet era.