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Exit Windows Defender Service Manager window.

Make sure to start Windows Defender Service, check if status is “Running”.

At Properties window, make sure Windows Defender Service Startup type is set to Automatic.

Right click on it and click Properties from the drop down menu.

Scroll down and search Windows Defender Firewall program.

Press the Windows key + R on your keyboard to open RUN box.

When Windows Defender service does not start after you enabled it, you need to manually configure the service to Automatically start. Once computer completely reboots, check if Windows Defender does not start on Windows 10 issue still occurs.

Repeat the same procedure for all third-party programs.

Follow the on-screen instructions on how to uninstall the program.

Right click on the program and click Uninstall device from the drop down menu.

Scroll down and search third party antivirus.

Click Settings, an icon that looks like a gear to open Windows Settings.

Press Start or Windows Key located at the lower left.

To check if this is the culprit, uninstall all third party antivirus software and check the problem will be fixed. There are times where third party security program conflicts with Windows Defender antivirus software on your computer. Method 2: Uninstall all third-party antivirus software

This action refreshes the operating system and remove any corrupt data that could be causing the problem.Ĭheck if Windows Defender does not start on Windows 10 PC issue still occurs. Listed below are troubleshooting methods that you can try in order to fix the issue with Windows Defender does not start on Windows 10.īefore performing any of the recommended troubleshooting solution methods listed below it’s best to restart your computer first. Other than that, a third party antivirus program that conflicts Windows Defender can also be the culprit. There are factors that can cause this error to appear such as a corrupt registry key of Windows Defender to a disabled windows defender.

Fix Windows Defender Won’t start on Windows 10 PC In this latest installment of our troubleshooting series we will tackle the ways on how to fix Windows Defender Won’t start issue. However, There have been reports from many users experienced the program does not turn on as the defense program whenever they start Windows Defender Antivirus but instead gets an error code 0x80070422 message “The service couldn’t be started. The service cannot be started, either because it is disabled or because it has no enabled devices associated with it.” is shown on the screen. A program that gives real-time protection of your computer against threats such as malware and spyware. Windows Defender Antivirus or also called Windows Defender Security Center is a built-in antivirus program of Windows.