I have Windows Server 2003 running a small network. One of the PCs is running Windows XP Pro, it works fine. A Mac Book Pro is also working fine. Another PC is dual booting to XP Pro and Vista Business 64. The partition with XP Pro works fine. The Vista 64 partition does not. I get the following error message when I try to join it to the domain while running Vista 64: "An attempt to resolve the DNS name of a DC in the domain being joined has failed. Please verify this client is configured to reach a DNS server that can resolve DNS names in the target domain." I am not very experienced with Windows Server. Any suggestions?