Windows Defender in Windows 10 Can Not Turn On
Can Not Turn On Windows Defender in Window 10 : Displays Message “This App has been Turned Off and isn’t Monitoring Your Computer”
Try to turn ON Windows Defender Service
How to perform a Clean Boot on your Computer?
sc start WinDefend enable
When you are checking Windows Defender, It is possible that in spite of performing all the above mentioned task, your system may still respond by the message “This app has been turned off and isn’t monitoring your computer.” This is possible because the third party software for security services e.g. Antivirus or Anti spywares, which you have loaded onto your system, has changed or corrupted some parts of the Windows Operating System.
If everything fails, you can try to uninstall the third party Antivirus or Antispywares from your computer to start the Window Defender.
You can attempt to check the system by going to ‘Security and Maintenance’ option of control panel and use the Recovery option to restore the software corruption.