Quote Originally Posted by Harry Kuhman
Would you mind doing a simple test and seeing what happens when you really run from the CD rather than running from HD and claiming that it's technically the same? When I run from CD I sure don't have the problem that you have, and if DNS lookup is right and you TCP/IP stack is clearly working than I can't imagine what the problem could be other than my guess that you had "installed" to HD but not wanted to mention it. Make a CD if need be.
I have done the same thing and it doesn't make any difference to run the ISO from the hard disk. It runs exactly the same way as if from CD. It is quite possible that his ISO is corrupt, but it won't help at all for him to burn a CD of a bad ISO.