Is a 3rd party anti-virus needed for a Windows 10 PC?

I heard expert Steve Gibson and Leo Laporte talking about this in the last few episodes. Steve says if you connect to the internet through a NAT router, that's your hardware firewall, and Windows Defender will do just fine as the AV, so a 3rd party AV system like Norton or McAfee isn't needed any longer. ... show more I heard expert Steve Gibson and Leo Laporte talking about this in the last few episodes.

Steve says if you connect to the internet through a NAT router, that's your hardware firewall, and Windows Defender will do just fine as the AV, so a 3rd party AV system like Norton or McAfee isn't needed any longer. Leo agreed with him.
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