How to disable Windows Defender via Windows Security? However, if you are determined to do it, here is a small guide on how to do it. I do not recommend switching off your antivirus if you are spending a lot of time on the internet. There can be few reasons: you use another security software, installation of particular applications require disabling antivirus, or it just annoys you every time with its notifications.
Sometimes you need to disable Windows Defender.
