Is antivirus software good or bad?

Everyone remembers working on the home desktop and seeing the alert pop-up in the right-hand corner of your screen: time to upgrade your (Name Brand) antivirus software. Clicking it takes you to a web page where the company tries to upsell you on the latest enhancements to their product. Today, antivirus software (AV) or more precisely, antimalware software, is more sophisticated, and some security experts will say, begrudgingly, that tools like Windows Defender are “mostly good enough” for...