IS free antivirus software good enough?
That would depend on which free software is being used. Also what the computer is being used for and who is using it would make a difference. If it’s a personal computer, you’re the only one using it, and you don’t recklessly click links that you’re not sure about then a good free antivirus software would be good enough. If it’s a business computer where several people have access then it is better to have a paid antivirus service with more extensive features.