I don't know what to do. Every install of either 13.04 and 12.04 on my Dell does not have a working wired or wireless internet connection. However, if I am running from USB in the trial mode I have working internet through a wired connection using the same ethernet cord.
I honestly at this point do not know what I can do to fix this issue as I have gone through every possible fix I have found here and in other places.
sudo apt-get remove bcmwl-kernel-source
thensudo apt-get install bcmwl-kernel-source
as in the following information page https://help.ubuntu.com/community/WifiDocs/Driver/bcm43xx – Simon Jun 26 '13 at 16:05