Windows 10 was released by Microsoft in 2015, and its soft two-note notification chime became the default alert sound for messages, mail and system notifications across millions of PCs. Because the operating system was so widely used, the sound became instantly recognisable around the world, even to people who never changed their settings. As clips from the system were shared online, creators began using it in memes, reaction videos and edits to fake incoming alerts, and it remains popular because that shared familiarity makes a simple ding feel like a real interruption.