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#11
If you add the word "additional", to your statement, to make it "Windows 10 does not need any additional AV", then that would match the thoughts of a lot of experienced users. with the improvements in recent router firewalls, and as long as you surf the net safely, and keep the built in Defender up to date,. then you should not have any serious issues with malware on Windows 10.
I am currently using Bitdefender Total Security 2017, because my work can sometimes take me following links that lead down some nasty rabbit holes