Microsoft Loopback Adapter Windows 11 Jun 2026

The —officially renamed the Microsoft KM-TEST Loopback Adapter in newer versions like Windows 11—is a virtual network interface that emulates a physical network card. It allows a computer to communicate with itself using standard network protocols without requiring a physical connection or external network hardware. Key Use Cases

The Microsoft Loopback Adapter is a crucial tool for developers and network administrators. It allows you to test network software and configurations on a virtual network interface without requiring a physical network connection.

In Windows 11, the legacy "Add Hardware" wizard in Control Panel is hidden or deprecated. The most reliable method to install this adapter is via the Device Manager. microsoft loopback adapter windows 11

If you are troubleshooting routing tables or testing VPN configurations, a loopback adapter provides a persistent endpoint that does not depend on unstable Wi-Fi or Ethernet cables.

In modern Windows versions like Windows 11, it is officially named "Microsoft KM-TEST Loopback Adapter" . It allows you to test network software and

Tricking older database systems or enterprise software that strictly require a static IP or a permanent network connection to launch.

: Choose "Install the hardware that I manually select from a list (Advanced)" . Choose Type : Select Network adapters from the list. Find the Driver : Manufacturer : Select Microsoft . Model : Select Microsoft KM-TEST Loopback Adapter . If you are troubleshooting routing tables or testing

If you run VMs (like Hyper-V, VirtualBox, or VMware) and want to isolate them from your main network while still allowing them to interact with the host machine, you can bridge them to this adapter.

Click , click Next again to confirm, and then click Finish . How to Configure the Loopback Adapter

Windows 11 restricts bridging with certain virtual or legacy adapters.