Hello, everyone. There are two users in my office who are suddenly unable to access some internet sites that they have always been able to access before. I am able to navigate to the sites from other machines in the office with no problems. The two users who are having problems are receiving the "page cannot be displayed" message when they attempt to go to some sites; at the bottom of the error page it states "DNS error or server cannot be found". They are able to access other internet sites with no problems. It's not the sites themselves having problems because I am able to get to them from other computers.
One of the machines is running XP Pro, the other is 2000 Pro. We have a Novell network here with client version 4.91. I've tried adjusting the security settings in the browsers, but it has not made a difference. Nothing has changed on the network or on the machines; no new software or hardware has been installed. There are no viruses resident on either machine.
Please help if you can! Thank you in advance for your replies.