I can’t tell you how many times I have had customers bring in computers that got super infected, only to be told that “I have 3 antivirus programs on there – I don’t know how this could happen.”. You see that’s what we would normally think; the more protection the better – just not when it comes to antivirus. This article will answer the question, “Should I use more than one antivirus?”.
NEVER! Now that we have that out of the way, let’s take a deeper look. What ends up happening when you have more than one antivirus installed is that they begin to fight each other for control. When the two or more antivirus programs are fighting each other they are too busy to be protecting you. This happens because, in many cases, they label each other as potential threats. The lesson to be learned? Only use one antivirus program on your computer. Whatever antivirus you decide to use, make sure you keep it constantly updated and run a system scan at least once every month.
I know that I have talked about what antivirus you should use previously, but again I would like to suggest you use Microsoft Security Essentials. The reason I suggest MSE is because it is constant updated, never needs to be renewed annually, & best of all it is completely free.