The article "Troubleshooting Browsing Error Messages in Microsoft Internet Explorer" describes the steps you can use to troubleshoot the following error messages:
a. The Page Cannot Be Displayed.
b. Internet Explorer cannot open the Internet site Web address. A connection with the server could not be established.
c. The page you are looking for is currently unavailable. The Web site might be experiencing technical difficulties, or you may need to adjust your browser settings.
d. Cannot find server or DNS Error.
e. An internal error occurred in Windows Internet extensions.
Note: If you don't find anything relevant, step-back to the main page titled, "Internet Explorer Support Center" and start on another item.
I can no longer get IE 6 SP1 in XP to connect to any web site or display any web content, only the message "Cannot find server or DNS Error". Programs that use IE browser (Quicken, Turbo Tax, and Windows Update) will also not connect. I can display HTML pages that were downloaded previously.
I use a broadband cable connection which XP detects as operational. I also use Netscape with no problems at all