Windows 8 and 8.1 Forums


Window Defender will not turn on.

  1. #1


    Posts : 2
    google chrome

    Window Defender will not turn on.


    I have discovered that my Windows Defender is off. I have tried everything but I can not get Defender highlighted, no check boxes, etc to turn on. I am using Windows 8.1

      My System SpecsSystem Spec

  2. #2


    Posts : 879
    Windows 10


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      My System SpecsSystem Spec

  3. #3


    Canada
    Posts : 1,950
    windows 8.1 Update 1 Pro 64bit


    If you have a third party anti virus program installed then Windows Defender is turned off by default and will only turn on if you uninstalled the third party AV. Otherwise the suggestions of genet will help.
      My System SpecsSystem Spec

  4. #4


    Posts : 2
    google chrome


    Thank you!! I tried what you said and it didn't work! The boxes were already checked. I only have AVG do I need to delete that?
      My System SpecsSystem Spec

  5. #5


    Canada
    Posts : 1,950
    windows 8.1 Update 1 Pro 64bit


    As I have mentioned, if you have AVG installed, Windows Defender will not turn on. You cannot have two anti virus programs running.
      My System SpecsSystem Spec

  6. #6


    I think you will find that, once uninstalling AVG, Defender will turn itself on. If it does not, you can then turn it on yourself.
      My System SpecsSystem Spec

Window Defender will not turn on.
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