There are Antivirus Products available that are very good. Some Antivirus Products are not so good. The Internet has a host of software reviews. I have been using Bitdefender for around 5 years or more. Here are links to Antivirus software reviews and sites. Remember to look at more than one review. If the results are similar, then the chances of the information being useful is much better. Also check the date of the review. Software quality changes from year to year.
Antivirus and Antivirus Plus
Internet Security Software Reviews