Hi, The best "all-around" antivirus is chosen by you. We have no influence on what antivirus you choose as it's based on personal preference but I can give you some samples on what I know. The below are all <b>free</b> by the way. *Avast (http://www.avast.com/en-us/index) *AVG (http://free.avg.com/us-en/homepage) *BitDefender (http://www.bitdefender.com/solutions/free.html) *Avira (http://www.avira.com/en/avira-free-antivirus) But in the end, it's up to you. P.S. This is a Firefox support forum used for technical support on Firefox. This thread is off-topic and doesn't belong here but I see that it's your first question here, I'll let it slide :) Let me know which antivirus you chose. Thanks!<br> -M