The title may be misleading in that its an easy problem to fix (unconnected cable, firewall, etc.) Well i recently (yesterday) recovered my other laptop (Windows XP, Inspiron 1525, Dell) and now it wont acknowledge that the ethernet cord that runs to my modem is in its ethernet port. I completely deleted everything off of my old laptop and reinstalled the recovery disc that came with it along with the driver discs. Now it won't play sound either but i fixed that on another computer i did this to by just downloading a device driver scanner program and downloading all the ones i didnt have. The other computer was a Windows XP too, and the ethernet port still worked on it afterwards. I did the exact same thing. The only difference is its a desktop. Now I know its not firewalls because then when it was in the port the modem connected light would come on. (its on now while im connected with this laptop) Well it doesnt come on at all when its supposedly connected to the other laptop.I know its not a cable loose or whatever because it will connect with this comp and not that one so the only difference is the computers.