Firstly thanks for taking the time to read this post!
I had to reformat and lost all drivers etc. My Ethernet connection is active but its not picking up the signal on my computer, so therfore I installed USB.
I'm now looking to use Ethernet since its better (so I was told).
Apparently I have to install some drivers. Here is a link to the dell website with my PC details etc. Could you point me in the correct direction of which one to download and tell me what else I need to do?