On my network of 30 computer I have one that is running XP and does not recognize my local domain.  I cannot chage from a workgroup to the domain because the PC doesn't recognize the domain.  From this PC i can ping the domain with both IP address and the domain name.  In Windows Explore the domain does not SHOW up.   This computer, to my knowledge is not setup any different that any of the others that had no problem joining the domian.
Anybody have any suggestions on what to try to resolve this problem.Which version of XP do you have running on the rogue PC?  What network hardware?  What software FIREWALL?  What O/S is your server running?  Etc.

The more info we get the better a chance we have of OFFERING useful suggestions.  Hi,
   The client trying to join the domain is a Dell Deminsions, the OS is Windows XP Pro, I turned off the firewall on the client, the Server is a Dell running Windows 2000 server.  The Domain server is also the DNS and the workstation is setup with the server's IP address as the DNS.  The confusing thing is other Dell's using XP Pro are connecting ALONG with a whole bunch of Win 2K Pro workstation, all with no problems.  I haven't been able to detect any differences in the setups of the computers that work compared to this one that doesn't.In the network settings for this workstation's NIC, is everything set up to use DHCP?  Or do you have anything manually assigned?  (The WINS tab under "advanced", for example.)

Can you browse to the domain controller using Windows Explorer?  (i.e. "\\servername\anyshare")I have a DHCP setup but this workstation, as well as most others in the domain, have the IP address, mask, gateway and DNS IP address entered manually.  I checked today and using explore and all other methods within Windows doesn't allow me to recognize the domain.  I also can't see the shares on the domain.  Only at the DOS prompt can I ping the domain by both IP address and by the domain name.  By the way the domain is LancasterChristian.com  or LCS.  Both work for the ping but nothing works in the Windows envirnment.  
   Tomorrow I'm going to reinstall the Windows XP and if there's any corruption in there reloading the OS may help.  I'll let you know but at this point I don't even have an idea of what to do.  I'll also try running DCdiag on the domain.  Thanks for your help, it's nice to have someone to share these problems.
BillRogue hosts or lmhosts files, perhaps?

If you're going to GO ahead and reinstall, then perhaps we should leave further diagnosis until the workstation is back up and running.

With 30+ computers, isn't it a bit of a pain manually assigning IPs?  Can't you just leave the server(s) on manual IPs, and simply let the domain controller assign and collate IPs for the rest?

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