The file typically appears when you plug in a Realtek-based USB Ethernet adapter or a docking station with a built-in Ethernet port. It is part of a "virtual CD-ROM" feature designed to let you install drivers without an internet connection. Is it Safe?
Never use drivers pre-loaded on a device or from unofficial links. Download them directly from the official manufacturer: Realtek Official Download Center Dell Support (for Dell laptops/adapters) HP Support (for HP devices) Use Device Manager: Right-click the button, select Device Manager , find your network adapter, and click Update driver to let Windows find the verified version automatically. Microsoft Learn rtk nic driver installer verified