We are experiencing a very frustrating problem at the moment and I hope that somebody knows the solution. We have an office with 1 server, 5 PC's and 4 Macs. None of us can view web pages in IE or Firefox. However, the broadband connection is clearly working because email to our exchange box is not affected, and I can use terminal services to talk to the server from outside the office. I can also pick up pop email.
Our virus software (NOD32) is not showing anything untoward. Hijack this hasn't shown anything unexpected and I have changed the firewall, yet the problem has reappeared. I have also double checked the DNS settings (as well as tried redirecting the DNS through another server) but this makes no difference.
Does anybody know of a virus or something similar that might cause this or have any other ideas?