The problem is that the adapter is on the motherboard and you have not installed all the DELL drivers. Sometimes there is a separate disk of motherboard drivers. With Gateway you can go to their site, put in your serial number and they will provide links to all the drivers for your system. Don't know about Dell.
(You do have other computers with which to download stuff?)
Worst case scenerio, go to CompUSA or Circuit City, and for $10-$20 buy a Plug 'n Play network card.
Still, I'll see what I can do on Dell's site on one of my other machines. Thanx.
'Worst case' won't work with this computer -- this slimline case does NOT have any extra slots, so I've gotta try to figure this puppy out ...