Microsoft Security Essentials 2 is in my opinion the best free antivirus for people who want a simple, free and yet effective antivirus. The detection rates are high and it doesn�t bother you with complicated questions and recommendations, it simply does it�s job on keeping your computer clean.
However, like most free and paid AV products, there is always a chance that it might miss one or two intrusions. This usually happens with malware (viruses, trojans, etc..) that are so new that the AV�s have not yet added them to their database. I tested MSE myself with an unknown piece of malware and within 24 hours the malware was suddenly detected (when it did not recognize it less than 24 hour ago).
If you are an �aware� internet user (meaning that you understand security risks of opening email attachments from suspicious emails, messages and links and are not fooled by fake banners that pretend to be something they are not, or even better use an Ad Block plugin in your browser), then this AV might be the best choice for you.
However, if you are a more experienced user and understand concepts like �sandbox, host-intrusion-prevention, behaviour-blocking, spoofing, etc�, or you or someone you know frequently has problems with infected computers, then I would recommend Comodo Internet Security. I will talk about this in my next post.
