This is the non-commercial, non sponsored site that my computer guy recommends:

https://www.av-test.org/en/antivirus/home-windows/

or

https://www.av-test.org/en/antivirus/home-windows/windows-10/

You can click your version of Windows and read the tests. What works best for Win 7 may not be best for Win 10 (and so on).

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