Microsoft Loopback Adapter Windows 11 Jun 2026

Click on your computer's name at the very top of the device list. Click in the top menu bar.

Remember that in Windows 11, it is officially named "Microsoft KM-TEST Loopback Adapter".

Scroll down, select Network adapters , and click Next . microsoft loopback adapter windows 11

Choose and click Next .

Locate the new connection (it will usually be named "Ethernet 2" or similar and show underneath). Right-click it and select Properties . Click on your computer's name at the very

: Some older applications require a network interface to be "up" to function, even if they aren't communicating externally.

Select and enter a private IP block (e.g., IP: 192.168.50.1 , Subnet Mask: 255.255.255.0 ). Leave the Default Gateway blank. Click OK to save the changes. Troubleshooting Common Issues Missing "Add Legacy Hardware" Option Scroll down, select Network adapters , and click Next

It is primarily used for testing network software, troubleshooting, or creating a private network interface for virtual machines (VMs).

Use the adapter to isolate a web server or database running on your machine from the network.