Mine was up to date, which is not saying much, because there is so little virus activity on Macs--while researching this, I came across some commentary that indicated that severe damage can occur after certain types of browser related crashes--unfortunately, I was unable to save the link--the thing that is peculiar is that there seems to be a flap of this kind of trouble just now--if it is not a virus(and it would have to be a cross platform virus) I am hardpressed to figure why it would suddenly be a problem--