If you are looking for an Antivirus that is excellent for your PC while its free – Microsoft Security Essentials (64-bit) is the answer to that problem. You get a high quality protection against viruses, Trojans, worms, and other malicious software. Its a lightweight and user friendly app that mostly works in the background and all the updates and upgrades are automatic so you don’t have to worry about having the latest protection. And is an effective firewall that integrates with Windows. It is easy to figure out whether or not your PC is safe from viruses by checking the Security Essentials Icon, If the Icon is green that means that your PC’s status is good. Its really easy to use and it is an excellent quality Antivirus and the best thing about it is that it is absolutely free.