Windows XP launched in 2001 and stayed on home and office computers for well over a decade, so its system sounds became part of everyday life for a generation. The startup chime signalled a successful boot, while the critical stop alert accompanied error messages, frozen programs and failed tasks. As XP aged into a nostalgic internet symbol, creators began pairing the two sounds online as shorthand for a computer, plan or idea failing immediately after starting, a joke that still lands because both noises remain instantly familiar.