I spend a lot of my time opposing e-criminals these days, which started when I met captive women online at streaming webcam sites (http://endmafia.com).
So I have a few tips I can share with you. I've had security issues with free software generaly, but also AGV & McAfee. Also steer clear of anything assosiated Yahoo! or Google, tool bars, software, even there search engine, which return rigged results (You may remember Google were sued for promoting paedophile pornography, famously refusing to hand a weeks search terms to the US dept. of justice). Searches with live.com, ask.com are better. Ashampoo's free software has worked well for me. Microsoft software can generaly other than that it is under constant attack from these people.
Since Google do not tolerate any kind of negative review or free speach regarding them on the internet, you could easily see this vanish.