After setting the registry as described below, I've expereienced no problems whatsoever.

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Dnscache\Parameters]...

Well, I went on a hunch and replaced the mswsock.dll in the C:\WINDOWS\system32 with the one from the C:\WINDOWS\$NtServicePackUninstall$ directory, which should be the one previous to XP SP 2...

Well, the DNS problem is back. I've run the winsock fix program a number of times (and then changed the IP settings to the proper static IP address again), but it keeps coming back. Do you suppose...

Well, the winsock fix seems to have cleared all of this up. I've been running for hours now without any DNS errors popping up.

Thanks very much everyone.

Erik.

Guys,
Thanks! Very cool. I'll be trying that fix later today when I get a chance, and I'll report back and let you know the results.

Thanks,
Erik.

Hmm. Yea, I came to the spyware conclusion too. I was running Search and Destroy for a long time now, installed XP SP2, got the problem, ran AdWare to clear more of that stuff out, re-applied XP...

Well shame on me. Spoke too soon. It seemed like it was working. I left my Outlook running all night long and it got email from the Linux server OK, and never failed, but as soon as I started...

OK, well that hotfix appears to have resolved the problem.

Many thanks to one and all that have assisted in this issue resolution.

Thanks,
Erik.

antioed (http://www.daniweb.com/techtalkforums/member.php?u=2535), thanks for the info. and the link. I'll have to perform the tests and perhaps apply the hot fix to see if it fixes things. Can't...

I've not rebooted anything except the client. The client machines is dual boot, so I booted it back into Windows 2000 and this works like a champ. The network configurations for both machines is...

OK, since last post, I've done a complete sweep of spyware using both spybot and adware scanners, as well as re-installed SP2 in the hopes of resolving this problem. It doesn't.

The only way that...

OK, so I think I have this figured out. You'll never guess what it was.

I've been running spybot search and destroy to keep spyware cleaned out of the system. Then added XP SP2 and the network...

When I first installed XP SP2, I immediately turned off the firewall because I already have a Linux firewall protecting the LAN. I then got the maddening DNS error or server not found error message....