I had ("had" being the operative word) McAfee. Their disclaimer is that it won't protect you from everything which by default means it won't protect you from ANYTHING. At least that's what I found out when I got the "defense center" virus that merrily downloaded porn on my netbook everytime I turned it on. I called customer service and they told me that they couldn't offer a guarantee that their service would protect me from all viruses and malware so they weren't responsible for any repair costs at any time. I pretty much figured out a 5 year old could produce a virus that would get by McAfee so I dumped them.