Driver conflict or corrupted installation.
The adapter creates a software-only network endpoint. Packets sent to its IP are handled by the OS networking stack without leaving the host. You can assign IPv4/IPv6 addresses, configure routing rules, and use it like any NIC for local traffic, virtualization bridging, or testing. microsoft loopback adapter windows 11
This is not a problem—it's by design. The Microsoft Loopback Adapter is fundamentally incapable of providing internet access because it has no connection to any external network infrastructure. It routes traffic back to your own computer exclusively. Driver conflict or corrupted installation
The most reliable method to install the Loopback Adapter is through the Device Manager. The quickest way to open it is to right-click the Start menu icon and select "Device Manager". You can assign IPv4/IPv6 addresses, configure routing rules,
In the list on the right, select Microsoft KM-TEST Loopback Adapter . Finalize Installation :
A creative use of the Microsoft KM-TEST Loopback Adapter involves tricking Windows 11 into enabling its mobile hotspot feature even when no internet connection exists. Windows normally requires an active Wi-Fi or Ethernet connection to activate the hotspot. By creating a KM-TEST loopback adapter, renaming it to "Loopback," and running a PowerShell script, you can force the hotspot to turn on regardless of your actual connectivity status.
Click Next through the remaining screens and click Finish .