Tavis Ormandy, a Google information security researcher tweeted today: "I get asked constantly what av to use. You're missing the point; av creates more problems than it solves, and we're overdue an av slammer." https://twitter.com/taviso/status/708719788302831616?refsrc=email&s=11
Tavis has been finding vulnerabilities in a number of major Antivirus products over the last year or so. He just posted a blog about Security Software Certification in which he discusses how Comodo got certified yet he's found quite a few problems: http://blog.cmpxchg8b.com/2016/03/security-software-certification.html
Give that antivirus software has to have full privileges to do what it does, a security flaw potentially gives an attacker the ability to run anything they want. This looks like it could be pretty devastating if hackers start going after AV products and use them to install whatever they want.
I'm not ready to abandon AV but this is concerning. I'd like to hear what others think.