Windows defender

John, Re Windows Defender… Which version of Windows are you actually using?.
AVG Guru

I inadvertently activated Windows Defender on this computer. I have disabled it, but how do I get AVG started again?

OK John, With Win 10 Windows Defender has built-in real-time antivirus. For AVG use have a look @ this article (http://avgclick.me/prepareforAVGinstall). 
AVG Guru