The 1394 adapter is your firewire port. Windows considers it a network adapter because it can be, although rarely is, used for networking. Leave it alone, as it is not the cause of your problem. You say that you did not install any dsl software, yet the only way a separate dsl connection should show up is if you have installed software. How are you connecting to the dsl modem - by USB or ethernet? If by USB, the software is necessary and would explain why the connection shows up. If by etherenet, then it should be connecting through the local area connection. Are you turning the modem on and off when you reboot your computer? The modem should always be left on.