Not sure about that. But honestly, I would not use Mcafee anyway. Too much $$ and too much of a memory hog in my opinion. You will probably need to contact their customer support.
But if you are interested, check out Avast antivirus, they have a free edition for home users that is supposed to be good. I personally still like AVG antivirus, also free.
So a couple of options there. But generally, my experience with Mcafee has been that the program just seems to drag the computer down. There are better options out there for free IMO.