When the GUID of a network adapter changes on a client computer that is running Windows Vista, the computer registers an old IP address that was associated with the old GUID.
The client computer also registers new IP addresses that are associated with the new GUID. However, because the client computer registers old IP addresses, another client computer may try to use the old IP address. If the old address is not valid, a connection failure may occur.
Service pack information
To resolve this problem, obtain the latest service pack for Windows Vista. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
935791 How to obtain the latest Windows Vista service pack
Hotfixes and security updates that are included in SP2 for Windows Vista Service and for Windows Server 2008
For more information about the hotfixes and the security updates that are included in SP2 for Windows Vista and for Windows Server 2008, visit the following Microsoft TechNet Web site: -
For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:
119591 How to obtain Microsoft support files from online services
Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file.
The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
The GUID of a network adapter may change when you upgrade a computer to Windows Vista. The GUID may also change if the network adapter's configuration changes from Dynamic Host Configuration Protocol (DHCP) to static IP and then from static IP to DHCP. The old GUID and its associated IP addresses are not cleared from the DNS client configuration. Therefore, the old IP addresses remain registered for the computer. In this situation, the authoritative zone on a DNS server is populated with both IP addresses that are not valid and IP addresses that are valid. A DNS server cannot distinguish between IP addresses that are valid and IP addresses that are not valid. Therefore, when a DNS server responds to queries from client computers, the server may distribute an IP address that is not valid. If another client computer tries to use this IP address, the computer experiences a connection failure.
For more information about how hotfix packages are named, click the following article number to view the article in the Microsoft Knowledge Base:
816915 New file naming schema for Microsoft Windows software update packages
For more information about the terms that are used to describe software updates, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates