Microsoft released Windows 7 in 2009, and its startup sound quickly became one of the most recognisable sounds of that era of personal computing. The short chime played every time a PC booted into the new operating system, so millions of home, school and office users heard it daily for years. As Windows moved on, the sound lived on through YouTube compilations, nostalgia videos and meme edits, where it now signals a return to late 2000s technology and simpler desktop computing.