There is no reset or power switch on the DSL modem. There are no buttons at all on it, I searched for the usual recessed button you usually see on routers and modems that would reset the device, but didn't see anything. I tried unplugging the modem's power cord for a few seconds and then plugging it back in. Once the modem was back online I still couldn't connect with the desktop. (I've decided to try to resolve the desktop first since it has XP, it should be easier to get the network up an running).
I tried ipconfig /release, then ipconfig /renew. didn't work... /release gave a message saying it is already released. Then /renew took forever, and finally it gave a message saying the IP could not be renewed. The message was something about not being able to connect to DHCP server, I forgot to take down the message, I'll try it again and update this post with the exact message.
Any ideas on what else I could try?
EDIT: Here's the error message I get when doing ipconfig /renew: "An error occurred while renewing interface Local Area Connection 2 : unable to contact your DHCP server. Request ahs timed out."