Windows defender

Jacques, Which Windows version are you using?. From Win 8 onwards Defender was re-classified to a full AntiVirus prog which can conflict with AVG. During the AVG installation process Defender is auto disabled.
AVG Guru

Why has Windows defender blocked mij AVG virusscan and made it impossible to connect again?

Jacques, Which Windows version are you using?. From Win 8 onwards Defender was re-classified to a full AntiVirus prog which can conflict with AVG. During the AVG installation process Defender is auto disabled.
AVG Guru

Jacques, For your info, just in case that you are unaware, you can post the screenshots here in your topic. Click on 'Answer' & then click on the 'Image' [mountain symbol] & follow the instructions. 
AVG Guru