After upgrading to Windows 8.1 a new problem started in my system. I am not able to update Windows Defender. I am getting pending update notification but it is not working. I am not using any other antivirus because it slow down the system. I want a bit help here through which I can simply fix this problem. Because I cannot put the old Windows 8 backup. I am not having the dvd for the same. Can anyone help.
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