Tom’s Guide has a good review of the free antivirus / antimalware program Bitdefender Antivirus Free Edition in a post called Bitdefender Antivirus Free Edition Review:
https://www.tomsguide.com/reviews/bitdefender-antivirus-free
This & Windows Defender / Microsoft Defender / Windows Security are my favorite two free antivirus / antimalware programs at this time, do not run them in real-time at the same time though, most of the time I use Windows Defender (Microsoft Defender); but sometimes I turn it off & try Bitdefender Antivirus Free Edition instead.
John Jr's Blog 