This clip is the critical stop alert from Microsoft Windows 10, the system sound that accompanies an error or a stopped operation on a Windows PC. It replaced the older, more familiar Windows 7 version with a cleaner, shorter chime that still carries the same warning meaning for longtime PC users. Because it is heard in homes, schools and offices every day, creators quickly adopted it as shorthand for failure online, using it in memes, gaming clips and reaction videos to signal instantly that something went wrong.