Phillip Corcoran :
If Windows 10, Defender will be fine --- that's all I rely on and it's kept me safe.
THAT and occasionally I run the free version of Malwarebytes to make sure nothing got past Windows Defender. But one also needs to be very aware of what they click on and the kind of websites they choose to visit.
However, if the OP is like the average computer user and doesn't take care of where he goes on the Internet or what he clicks on in e-mails then he might need a stronger anti-virus/malware program.