Ethernet Controller Driver.

The problem started when I tried to get online.  I opened up my mozilla and it said connection was reset (something along those lines, ultimately nothing opened up), so I tried my IE, nothing; then I tried my Safari, nothing.  So I pulled up my Device Manager and the only thing wrong there was my EtherNet Controller.  So I opened it up and it told me that the driver wasn't installed So I chose the option to install it.  I don't have the driver disk so nothing has worked, and I haven't been able to install it.  I searched and searched to find the driver that I need but to no avail.  So the question is what driver do I need to download?

I have a Dell Inspiron 6400 with xp

intel (r) core duo cpu

t2250 @ 1.73Ghz

794 mhz 1.00gb Ram Physical address extension

(there's my gen info)

Oh and I think what happened is I deleted the driver for it on accident.  I thin that I did it when I was deleting stuff the day before this happened.