Windows Longhorn was Microsoft's codename for the operating system that became Windows Vista, and its system sounds included short alerts for connecting and disconnecting hardware. The 'Usb out' tag on this clip points to the removal side of that pair: the brief descending tone played when a USB device was unplugged. Longhorn builds circulated among testers and enthusiasts long before Vista's release, and its distinctive sounds were later preserved on soundboards, where retro-computing fans and video editors still reuse them for tech jokes and nostalgic throwbacks.