[Moonliner]

Try:

Start->Control Panel->System->Hardware->Device Manager

Dig around in there and see if you can find it listed, it might be labeled as unknown device but the properties might show you the make/model.

After installing the first driver, did you uninstall each driver and reboot before trying the next one? Trying to run conflicting drivers can lead to fugly results.

If none of that helped, I suggest you perform a hard reset - drop it out a second floor window. (Note: This assumes you still have a full warranty including breakage) and start from scratch.

Also you might want to call dell. Compared to a lot of other companies they are typically pretty good about answering their tech support lines.