I recently purchased a DELL computer, which has been nothing but a headache. It is a XPS 400 system, with built in ethernet. The system came pre-installed with no CDS, and when I plugged in the cable modem, nothing worked. It notices the network card is plugged in, but it can never aquire a network address. It will try for a few minutes, then the lan icon has an x over it (limited or no connectivity). I know the cable connection is good, it works on this computer. I even went out and purchased a linksys network card, and installed it on the system (disabled the onboard connection under lan settings) and still the same problem, it can't obtain a network address. DELL has no clue and isn't helping me in the least, the best they can do is send me a whole new system in exchange which is a huge headache. Can someone offer a suggestion?