Having only Anti-virus does not protect you completely against viruses. There are Spywares, Malwares, Worms, Trojans and more….to handle besides just the viruses. Your only chance of being protected is to get the best ‘Internet Security’ software which comes along with ‘Antivirus’ – or – Anti-virus and other Anti-Malware, Anti-Spyware, Anti-Rootkit software. I am encouraging you to have these software because malwares, spywares or trojans can reside in PC silently and send your personal information (critical one) to hackers. One day you will know that your password for FaceBook or email has been changed by any hacker who got your personal information by any anonymous hacking website, even you had up-to-date Anti-virus program installed. Here is my recommendation for top 3 Anti-Malware, Anti-Spyware and Anti-Rootkit software recommendation. Why 3? Because its like tooth paste. You get different benefits in different tooth pastes of different brands. Different security programs have different capabilities to catch different infections and culprits.