The answer to "What is best AV?" is highly subjective and personal. The reasons people choose certain software runs from geopolitical to varying degrees of paranoia to just liking the GUI.Now, let's hear what MT members have to say regarding their analysis and opinion about the best paid internet security software.
Jedem das Seine. To Each His Own.
My criteria is extremely light on resources, stable, reliable and highly compatible with Windows. That leaves basically F-Secure. A plus with F-Secure is there are never troubles with Core Isolation, I can still use MS Defender Exploit Protection, and other Windows protections. No problems with Visual Studio Code and its output. No problems using PowerShell. I can still enable MS Defender for periodic scans (hardened to MAX with Configure Defender)... and it all just works together for a nice user experience.
Caveat: F-Secure is not the greatest protection against malicious scripts. For a paranoid user they should block commonly used sponsors, scripts or create sponsor block firewall rules.
Friends that are unmanaged home users - I gave them Chromebooks as presents. The few times I did look at their Windows laptops, each one was infested with PUA\PUPs.In the last 10 years I have not heard of any relative, friend or distant acquaintance complained of being infected, while I know that at least two of my friends owning an company have been attacked (one website hack and one partly successfull ransomware infection).
Friends that are in the IT industry, have not heard a single complaint about an infection in decades.
Businesses - it is my business to deal with infected businesses daily.
I do not recall any regular MT members except for the recent self-admission of an "almost infected" resulting from a software download from Youtube.
There once was a semi-regular MT member - 2 or 3 years after ransomware really hit it big - that was the type to search the internet for and download PDFs for "study & research." They did that once too often. ESET did not detect it as ransomware and upon opening the PDF (obfuscated .exe) all their files were encrypted. This included their PhD work product. They had no backups.
This is one of the appeals of F-Secure. It cannot be tweaked, but unless you are a prolific, wonton downloader who has no regard for security, it will do a good jobI don't take a lot of notice of comparative sites to be honest, out of all AV's I use F-Secure, I can't say how effective it is as I've not had in infection for use a least 20 years & that was a worm - F-Secure is stable & simplistic I would also stick Emsisoft & ESET on my list too, I've never had issues with either of those.