How Can You Fix Windows Defender Firewall Issues on Windows 10?

Your Windows computer contains some built-in tools to keep your computer and data safe. Windows Defender Firewall is one of these tools. It can filter the network data transmission to and from your PC and block suspect harmful programs.

Windows Defender Firewall works deliberately to block suspect ports and programs. It may cause some issues like 0x80070424, a program is unable to start, 0x6d9 error, etc.

How fix Windows Defender Firewall issues? You can solve the issue by using Windows Firewall Troubleshooter or resetting Windows Firewall settings to default. If Windows Firewall blocks a legal program, you can allow that app through Windows Firewall.

How to Check if Firewall Is Blocking a Port or a Program?

Do you know how to check if Firewall is blocking a port or a program? In this post, we will show you how to do this job using different methods.

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In the following content, we will talk about these three methods.

Fix 1: Use Windows Firewall Troubleshooter

If your Windows Defender Firewall encounters issues, you can use Windows Firewall Troubleshooter to fix it.

Here is a guide on how to use Windows Firewall Troubleshooter:

1. Go to this page and click the Download button to download Windows Firewall Troubleshooter.

2. If your web browser shows the download result, you can just click it to open the tool.

3. Click Next to continue.

4. As per your troubleshooter result, you need to select one option to continue.

5. When everything is fixed, you can click the Close the troubleshooter option to close the tool.

6. If Windows Firewall Troubleshooter can’t fix the found issues, you can click the View detailed information link to see the issue reports. Then, you can continue searching for the issue using Google and find solutions.

Fix 2: Reset Windows Defender Firewall Settings to Default

You can also fix Windows Defender Firewall issues by restoring the Windows Defender Firewall settings to default.

Here is a guide:

1. Search for Windows Defender Firewall using Windows Search and select the first result to open it.

2. Click Restore defaults from the left menu.

3. Click Restore defaults from the pop-out window to continue.

4. Click Yes to confirm the operation.

Fix 3: Allow a Program in Windows Defender Firewall

If you can’t use a program, it may be blocked by Windows Defender Firewall. You can allow it in Windows Firewall and then you should use it as normal.

This guide shows you how to allow a program in Windows Defender Firewall:

1. Search for Windows Defender Firewall using Windows Search and select the first result to open it.

2. Click Allow an app or feature through Windows Defender Firewall from the left menu.

3. Click the Change settings button.

4. Check the app or feature you want to allow. For example, if you want the app or feature to communicate in the local network, you can select the checkbox for Private. If you want the app or feature to communicate via your Windows Firewall on the internet, you can select the checkbox for Public. Of course, you can select both of them if needed.

5. Click OK to save the change.

Bottom Line

Reading here, you should know how to fix Windows Defender Firewall issues. Besides, if you lose your files by mistake, you can use MiniTool Power Data Recovery, professional data recovery software, to get them back.

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Should you have any related issues, you can let us know in the comment.