I have a contract with Telus internet for three years. There is one year left of it.  The contract includes free Telus security. It's quite good, I like it. I have used AVG free in the past and it seems to work too. People tell me Avast is also good. Norton, on the other hand, seems to find its way in on other programs, like malware would.   You have to be sure to opt OUT or they will inclued it automatically wether you want it or not.  I found in the past that running two security programs at once doesn't work because they attack each other, haha!