Re: Networking Problem
Have you checked the settings on that other computer?
If the other devices connected to that hub are fine, then it's probably the computer that's at fault. Check to see if it's getting an IP address, and if the web-browser knows what connection to use to access the Internet.
Get the hostnames of other machines on your network, and try pinging them from the red machine. That should help you begin to troubleshoot any serious problems.