Please post the output of -
To download a package and its dependencies, you can use "apt-get install..." with --print-uris option. This options makes apt to print the download URIs of all the required packages instead of itself trying to download and install.
modprobe -c | grep -i 14e4.*4365
To do this with the sta driver, build-essential and headers, please run command (sudo is not required) -
If prompted with Y/N to install, go ahead with "Y". Instead of downloading, it will print the URIs of all the required packages (plus their MD5Sums in front of them) at the bottom of the output.
apt-get install --print-uris linux-headers-generic build-essential bcmwl-kernel-source
Copy all these URIs in a text file and use them to manually download the packages.
Copy these downloaded packages in a new empty directory on your desktop (to avoid confusion, let's name the directory packages), then open a terminal and do -
This will install all the packages within the directory. Post back the full output of "dpkg -i" in terminal, so we can ensure everything went fine.
sudo dpkg -i *
I've recently seen the default sta driver fail to build on newer kernels on some systems. If that happens in your case too, we may have to try another version, a newer one that is not yet included in the default repositories.