Windows Live Messenger, originally launched as MSN Messenger by Microsoft in 1999 and rebranded in 2005, was the dominant instant messaging app of the 2000s before shutting down in 2013. Its small interface sounds, including the subtle alert played while a contact was typing, became deeply familiar to millions of users. After the service closed, those sounds lived on through soundboards, YouTube nostalgia compilations and TikTok retro edits, where the typing cue now works like a retro Discord notification for old-school online chatting.