Is it enough to protect the computer?
I used to use Avast! a while ago. If you are getting your software from legal places you cannot get infected. Some people swear that the built in Windows Defender in Windows 10 is good enough. That's what I use and I try to be as careful as possible. Malwarebytes is a good option like others mentioned but you have to pay for it. What others kept telling me is that the best antivirus is "you". It all depends on what you click on what you install. If you keep your software up to date nothing can go wrong. Companies patch security holes and push them out to users for a reason. To keep everyone protected!