The best antivirus I prefer is AVG antivirus. The reason why I prefer AVG antivirus is that I have experienced a lot of problems with the use of other antivirus in my computer especially when I work online. Nowadays more and more virus is being developed in internet world, but without the best antivirus when in online will make our computer to get affected. So use the best antivirus to work with.
Let me tell you one example of my real experience. When I bought laptop, I used AVG antivirus, but without someday it got outdated. So I uninstalled that antivirus and used some other. Within someday, my laptop crashed. I phoned to my brother and said this, then he suggested me to install AVG and told to update. Then after updating I scanned the whole system and my laptop worked properly. So when you use internet, be sure to install AVG antivirus.