It is an issue that after installing Microsoft KM-TEST, you cannot use the mobile phone hotspot to access the Internet

Question

Win11 can not use the mobile network to access the Internet after installing the Microsoft KM-TEST loopback adapter, although the mobile network can connect normally, and automatically assigns IP addresses and domain name server addresses, but Edge cannot open the website, ping the website address does not respond. How to solve it? The computer has IIS and Microsoft KM-TEST loopback adapters installed for web design testing. The system is Win11 Pro, Surface Pro 8 LTE, SIM card is China Unicom's mobile phone card.

Answer 1

Hello Scwhcn,

Thank you for your question and for reaching out with your question today.

It seems like you're facing connectivity issues with your mobile network hotspot after installing the Microsoft KM-TEST loopback adapter on your Windows 11 Pro system. The loopback adapter is typically used for testing and development purposes, and it might be affecting your network configuration.

Here are some steps you can take to try and resolve this issue:

1. **Check Network Settings**: Make sure that your network settings are configured correctly. Check if the loopback adapter is set as the default network adapter for some reason. You can adjust the network adapter priority by going to Settings > Network & Internet > Change adapter options.

2. **Disable Loopback Adapter**: Try disabling the Microsoft KM-TEST loopback adapter temporarily to see if it resolves the issue. If your mobile network starts working again after disabling the adapter, the loopback adapter might have been causing the problem.

3. **Check IP Configuration**: Open a Command Prompt with administrative privileges and run the following commands to reset the TCP/IP configuration:

netsh winsock reset netsh int ip reset ipconfig /release ipconfig /renew ipconfig /flushdns

   After running these commands, restart your computer.

4. **Network Troubleshooter**: Use the built-in Windows Network Troubleshooter to diagnose and potentially fix any network-related issues. Go to Settings > Network & Internet > Network troubleshooter.

5. **Uninstall Loopback Adapter**: If disabling the loopback adapter doesn't help, you might need to uninstall it. To do this, go to Device Manager, find the Microsoft KM-TEST loopback adapter under Network adapters, right-click, and choose Uninstall. Then restart your computer.

6. **Update Network Drivers**: Make sure your network drivers are up to date. Outdated drivers can sometimes cause network issues.

7. **Check Firewall and Security Software**: If you have security software or firewalls installed, they might be blocking certain network traffic. Try disabling them temporarily to see if it makes a difference.

8. **Check Proxy Settings**: Ensure that proxy settings are not configured if you're not using a proxy. Go to Settings > Network & Internet > Proxy and make sure "Automatically detect settings" is turned on.

Remember to back up your important data and take caution when making changes to your network settings.

I used AI provided by ChatGPT to formulate part of this response. I have verified that the information is accurate before sharing it with you.

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Best regards.