In this day and age Windows built in anti-virus "windows defender" is plenty fine on its own. I haven't used any third-party anti-virus for years and haven't gotten a virus with normal browsing. I even tested windows defender with known malicious software and it picked it up pretty quickly. The only downside is that unlike other anti-virus software windows defender user interface isn't as in-depth. But it's worth it not having to deal with norton or avast or sophos chugging away my system resources at random times or when I'm moving well known trusted files.
Though if you really want a third-party anti-virus, bitdefender, sophos, norton, avast, and malwarebytes are good options. Avoid McAfee. They had a recent scandal of reporting false viruses to get people to pay for technical support. Another reason why I don't use third-party.