What antivirus is best despite cost?

I know that among all the Antivirus softwares available, AVG, Norton Antivirus and Avast Antivirus are popular but the question is that each of them have great flaws that are not permissible. E.g. Avast antivirus has a good detection but ability but cannot remove the virus when Found. The question now would be what Antivirus Program is recommended especially for those who do not know much about computing – I mean who only have computers for the sake hooking it up to the Internet and maybe use Word Processing and that’s all they can do with their PC?