I used to use ubuntu a lot but I left the country (and computer) for about 3 years so please explain to me like I was an absolute beginner. When I came back last week I simply updated my ubuntu 8.04 version to ubuntu 10.04. Everything when fine for about a day after what I apparently lost the connection with the router which obvoiously involve lost of the internet connection the only thing I know is that I have two compurter (one with windows which work just fine) and the other one with ubuntu 10.04. My router is a d-link di 604 and when I try to ping it it says I can't connect to it. Where should I start from there (please be as specific as possible) thanks for the help