Install the Microsoft Loopback Adapter
This network adapter is nice to test networking app without exposing them to your normal network. Screen shots are in German, the description is in English.
1. Start Administrator Command Line
Easiest way to do this is to press the Windows key and type
cmd. Instead of just typing enter type Ctrl+Shift+Enter.
2. Start the Windows Hardware Wizard
In the opened command prompt form 1. type
3. Accept Infoscreen
Just click on Next (Weiter in German):
4. Choose Manual Setup
Select Install the hardware that I manually select from a list (Advanced) and then Next:
5. Select Network Adapters
Select Network adapters and then Next:
6. Choose the Microsoft Loopback Adapter
In the Manufacturer list, click Microsoft and then in the Network Adapter list, click Microsoft Loopback adapter for KM-TEST. Then Next:
7. Accept the Summary
Just click Next:
If a message about driver signing appears, click Continue Anyway.
8. Driver is Installed
Everything was setup successfully. Just click Finish: