I have had Norton Antivirus for almost a year. I am deciding whether to renew or not. First, I have been happy with it. Unlike most of the complaints against it, I actually find it very light on resources (I see no signs of it all - from my experience, it is same as Microsoft Essentials in no signs of resources usage and less resource useage than Free Avast.) For example, I have it on two computers, and the older computer is generally slow in everything it does, yet Norton Antiviurs does not tax it. My concern is that many people on this forum state that many viruses are designed to get around Norton Antivirus since it is so popular, therefore Norton Antivirus causes more risk - I even heard the Geek Speak guys on NPR voice that opinion too. But labs like AV Tests, and Dennis Technology and AV Comparatives (2011-previously until Norton pulled out for disagreements on testing done by AV Comparatives) and others testing sites, all show very high detection and blocking results for Norton Antiviurs with it having equal results to Kaspersky and Bitdefender - those being the big three above everyone else. Also, about every other week I use MalewareBytes scan program and has not found anything wrong. And every few months I scan with TrendMicro's Housecall online scanner as well as Avira boot CD scan, and neither finds anything wrong (although Avira did once but when I uploaded the two files, that it flagged and both temporary data, to Virus Total, a site that scans the file with 25+ antivirus programs, it found nothing wrong and showed that many users had analyzed the same files recently, so both were likely false positives.) Is that concern (many viruses are designed and able to trick Norton Antivirus) just opinion or is it sound and grounded in actually testing/experiences? If the latter, would someone point to tests etc. that have demonstrated that Norton lets more viruses through? Thanks for any help.