Why do you need an antivirus in your computer? Well, you would understand for yourself if you spend enough time on the internet, you are sure to find yourself clicking on a link that is malicious and in no time, you will find yourself in a soup when your cyber experience will be compromised.You must choose your antivirus judiciously, and Mcafee antivirus is just the product you will need to protect your computer system from viruses, rootkits, worms and other malicious software.