http://www.bitdefender.com/solutions/free.html
FWIW, when McAfee would no longer work on my wife's AMD PC I gave her a couple of trials to check out, Kaspersky & BitDefender, the 2 top ranked at the time. She tried BitDefender first, loved it, & never looked at anything else -- she still loves it. As I'm running out the remaining months of a McAfee subscription I can't say a lot more about it than that -- I haven't had to fix anything & my wife's very happy.