Windows Firewall Won't Turn On [Fixed]

Solve the annoying Windows Firewall Not Starting Issues

Windows Firewall is an important tool to protect your Windows system from cyber threats. However, sometimes you may encounter the problem of " Windows Firewall Not Starting ". This article will guide you on how to resolve this issue.

Windows Firewall Cannot Start on Windows 10/11

Windows firewalls are essential to keep your computer safe and protect it from potential threats. If you cannot activate the Windows Defender firewall, your device may face security risks.

Here are some possible solutions that you can try to fix the problem that the Microsoft Defender firewall cannot start.

How to fix Windows Firewall not booting

Method 1: Troubleshooting for running Windows Firewall

For Windows Firewall-related issues, Microsoft provides a troubleshooting tool to scan for your system failures and fix them. Windows Firewall Troubleshooting is not part of Windows' built-in programs, you need to download it from the official Microsoft page.

After downloading the Windows Firewall Troubleshooter, start it and follow the on-screen instructions to diagnose and fix related issues. After that, check if you can start the Windows Firewall.

Method 2: Ensure that firewall-related services are enabled

If the firewall is still not activated after running the troubleshooter tool, consider whether the Windows Defender firewall service and related services are functioning properly.

Step 1. Use the Windows Search box to open the Windows Service.

Step 2. In the Services window, scroll down to find and double-click the Windows Defender Firewall . In a new window, under the General tab, check that its service status is running .

If the Windows Defender Firewall service is disabled, click the Start button to enable it.

Step 3. Repeat this process for Windows Defender Advanced Threat Protection Service and make sure it is running.

Method 3: Disable other antivirus software

Sometimes, the Microsoft Defender firewall may not be activated because you use antivirus software from other vendors. To exclude this factor, you must temporarily disable other third-party antivirus software.

Method 4: Reset the firewall settings

Incorrect firewall settings may also prevent the firewall from opening. In this case, you can choose to restore the Windows Firewall settings to the default value.

Step 1. Type Control Panel in the Windows Search box and click it in the Best Match Results.

Step 2. Select the Windows Defender Firewall option.

Step 3. Click Restore Default Settings > Restore Default Settings . Then a "Restore Default Settings Confirmation" window will appear, and you need to click Yes to continue.

Method 5: Adjust the registry

The registry key configuration errors related to the firewall are also the reason why the firewall cannot be opened. You can delete the incorrect registry key as follows.

Step 1. Press the Windows R key combination to open the run window.

Step 2. Type regedit in the input box and press Enter .

Step 3. In the Registry Editor, navigate to the following location:

Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender

Check if there is a registry key named DisableAntiSpyware in the right panel. If it exists, right-click the key and select Delete .

Method 6: Uninstall the latest Windows updates

If you have an issue with "Windows Firewall Not Starting" after making a Windows update, you can try uninstalling the latest update. The steps are as follows:

Open Settings from the Start menu. If Windows settings are missing from the Start menu, you can right-click on the Windows logo button to select Settings .

Click Update & Security > View Update History > Uninstall Updates .

Then right-click the latest update and select Uninstall .

Conclusion

After reading this article, you should know what to do when the firewall cannot be opened.

If you encounter other useful solutions, or you have any questions about MiniTool software, please send an email to [Contact Email].

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