Window Defender will not turn on.

mlb12163

New Member
Messages
2
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 Computer

System One

  • OS
    google chrome
How to turn on Windows Defender 1.png

How to turn on Windows Defender 2.png

How to turn on Windows Defender 3.png

How to turn on Windows Defender 4.png
 

My Computer

System One

  • OS
    Windows 10
    Computer type
    Laptop
    System Manufacturer/Model
    Lenovo G580
    CPU
    Intel Core i5-3230M
    Memory
    8 GB
    Graphics Card(s)
    Intel HD Graphics 4000
    Browser
    Microsoft Edge
    Antivirus
    Windows Defender, standard user account
    Other Info
    UEFI firmware (BIOS) embedded Windows 8 product key.
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 Computer

System One

  • OS
    windows 8.1 Update 1 Pro 64bit
    System Manufacturer/Model
    Pavillion H8-1202
    CPU
    I7-2600 @ 3.4 GHz
    Motherboard
    PEGATRON
    Memory
    8 GB
    Graphics Card(s)
    NIVDIA GeForce GT 520
    Sound Card
    Realtek ALC656GR CODEC
    Monitor(s) Displays
    Samsung SyncMaster S22B350
    Screen Resolution
    1920X1080 32 bit color
    Hard Drives
    Samsung 850 EVO SSD 500GB
    Keyboard
    Razer Blackwidow Ultimate 2013
    Mouse
    Logitech M510
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 Computer

System One

  • OS
    google chrome
As I have mentioned, if you have AVG installed, Windows Defender will not turn on. You cannot have two anti virus programs running.
 

My Computer

System One

  • OS
    windows 8.1 Update 1 Pro 64bit
    System Manufacturer/Model
    Pavillion H8-1202
    CPU
    I7-2600 @ 3.4 GHz
    Motherboard
    PEGATRON
    Memory
    8 GB
    Graphics Card(s)
    NIVDIA GeForce GT 520
    Sound Card
    Realtek ALC656GR CODEC
    Monitor(s) Displays
    Samsung SyncMaster S22B350
    Screen Resolution
    1920X1080 32 bit color
    Hard Drives
    Samsung 850 EVO SSD 500GB
    Keyboard
    Razer Blackwidow Ultimate 2013
    Mouse
    Logitech M510
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 Computer

System One

  • OS
    windows 8.1
    Computer type
    Laptop
    System Manufacturer/Model
    Toshiba Satellite C75D-B7260
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