I’m with George 100%.
As a ‘computer security guy’ if we see infections we do not use AV to quarantine and recover any system. We start from scratch, fresh OS, fresh patches, fresh software, and in most cases a new hard drive. Malware and virus threats are always present but protecting against them is pretty much worthless. In Windows Defender is your best option by far. All these other AVs are next to useless and cause huge aggravation with their false positives and lock-downs. The threat to be concerned with is Ransomware and protecting against that using offsite backups and strict directory permissions. For most of us this is easily resolved with a little searching of the internet. Spawning new variants is as simple as downloading the source and making just a few changes that will evade most signature detection based anti virus tools. What you are left with is a terrible piece of software that in most circumstances is absolutely useless. Not only that it will steal from your resources, make changes most don’t understand, monitor, manipulate, and slow down your browsing experience, not to mention the numerous headaches with those all so common false positives. Save your money and spend it on an offsite/remote backup service. Just my two Cents.