I have two separate PCs running on XP and Win7. Both are having trouble updating to the latest dat files and therefore antivirus plus is warning that my computers are at risk. As its affecting two separate machines running different operating systems I suspect the problem is at the McAfee end. I have run virtual technician and the only problem it finds is out of date dat files which it attempts to fix but fails. Something similar happened a couple of months ago and it resolved itself. Anyone having similar difficulties?