My oS is win 7 prof 64 bit and i use Comcast Xfinity for my internet connection. Although the comcast came with Norton's anti virus I had uninstalled and am using McAfee,. From time to time I now get a Norton's DNS error message as in the attached file. And I do not know what to make out of it or why this is happening, and what I should be doing about ti. Hope the Gurus can please advice. Thank u.