windows defender will not turn on windows 10

Method 1: Disable 3rd party Antivirus Servicesġ. Make sure to create a restore point just in case something goes wrong. Method 10: Run CCleaner and Malwarebytes.Method 9: Manually Update Windows Defender.Method 6: Run Windows Update Troubleshooter.Method 4: Enable Windows Defender from Registry Editor.

Method 3: Start Windows Defender Services.

Method 1: Disable 3rd party Antivirus Services.

So without wasting any time let’s see how to actually Fix Windows Defender Does Not Start in Windows 10 with the help of below-listed troubleshooting guide. If Windows is not updated, then it’s possible that the Windows Update cannot download Definition update for Windows Defender, which is causing the issue.Īnyway, now you are familiar with the issues which are causing the problem with Windows Defender. Another important issue is Windows Update if Windows is not up to date, then it can easily cause trouble for Windows Defender. If this is the case here, you need to set the correct date & time and then again try to turn ON Windows Defender. In some cases, the issue is caused because of the incorrect date and time of the system. So, its always advised running only one Security application be it Windows Defender or the 3rd party Antivirus. If there are more than one security services running which are designed to do the same task, then obviously they will create conflict. Sometimes the main issue is that if you have installed a 3rd party Antivirus service, Windows Defender will automatically shut itself off. Also, everything else is turned off, and you can’t do anything about these settings.

If you go to Settings > Update & Security > Windows Defender, you will see that the Real-time protection in Windows Defender is turned on, but it’s greyed out.

When you click on “Turn ON” option, you will receive an error message “This app has been turned off and isn’t monitoring your computer.” The main issue is that Windows Defender is automatically turned off and when you try to enable it, you won’t be able to Start WindowsDefender at all. If you are unable to turn on Windows Defender in Windows 10 then you are at the right place today we will see how to fix the issue.

Windows defender will not turn on windows 10