The is a virtual network interface built into Windows 10 that simulates a network connection. It is primarily used for testing network configurations, local development, and running software that requires a network connection on a machine with no physical adapter.
Since this is a legacy virtual driver included with your operating system, there is it from external websites. It is readily available through the Windows Add Hardware Wizard. How to Install the KM-TEST Loopback Adapter on Windows 10 Follow these steps to enable the adapter on your system: Installing the Microsoft Loopback Adapter in Windows microsoft km-test loopback adapter windows 10 download