I really don't know much, but I know many times when I have had issues in the past it was because I recently had some change due to my NAV settings, or more specifically, firewall settings. In my case, other computers on my network would work but not the one I was trying to fix.
Windows 2000, using Belkin wireless G USB network adapter
connection speed through USB router is good, but the internet won't open.
Can't figure out how to configure the internet explorer connections, as the choices don't include wireless