I'm trying to install Ubuntu on a laptop without cd, so I'm using UNetbootin to install from ISO. The problem is I cannot resolve any ubuntu archive, be it www.ubuntu.com, it.archive.ubuntu.com or whatever. So the installation hangs at "donwloading release file..." (I'm using the alternate ISO).

Now the strange thing is the following: on the laptop I cannot go to www.ubuntu.com even on Windows, since I get a 503 error. On another pc I can browse that site and the others fine.

It is not a DNS error, since I get an error page from Ubuntu, nor is the site in the hosts file. By the way www.ubuntu.com corresponds for me to 91.189.94.158, and this IP works on the other PC.

Every other site works fine... what can I do?

By the way there definitely SHOULD be a way to install Ubuntu WITHOUT a network connection!!!!!!!