I hope this is networking, although I am not sure anymore.
My problem: A couple weeks ago, we started seeing that we could not get out to www.msn.com
(can't ping either). Sometimes we get page not found, sometimes .net, .org. etc were appended. I looked around on this site and others, and have adjusted the MTU down from 1500, to 1492 (test) then 1462 (test) now 1400. Still I have no reliability with either Mozilla or IE to reach various websites. I did a release, and renew on the router and still didn't help. I took off the append check in the DNS config on the server, didn't help either. Other sites take much longer than they should - google for eg. And the only way to get to the windows update site is to have google find it, then type in the address in the address bar. Sometimes a refresh helps, sometimes not.
I took a laptop from home, plugged into in the router (a Linksys RV082) and can get to sites no problem. So then I suspected perhaps the Trendmico firewall, took that off, but that didn't help the desktops.
We are running a very small configuration - windows 2003 standard server with terminal server, 5 desktops, all at XP SP2 with current patches. The laptop from home is SP1. Thought it might be active x type issue, but sometimes google takes forever to come up, sometimes never does.
I'm sure there is more I need to provide, but I'll stop here. Can anyone help me out?