Turning on windows defender in windows 10

          Windows Defender turned off by group policy     Recently,I detected  a problem while turning on windows defender. I couldn't turn on windows defender in regular way i.e from control panel. While accessing on my windows defender I got error message    "The app is turned off by group policy" .  Windows defender automatically turns off if you have another antivirus software installed and is  running on the background of your system. Here is the method that I solved my problem in accessing the windows defender.      Press win + R     Type   regedit  and press enter     Open HKEY_LOCAL_MACHIN     Open software     Open policies     Open microsoft     Open windows defender     On the right side delete that blue icon i.e disable spyware or something.      Now u can simply turn on your window...