Article ID: 837030 - View products that this article applies to.
Important This article contains information about how to modify the registry. Make sure to back up the registry before you modify it. Make sure that you know how to restore the registry if a problem occurs. For more information about how to back up, restore, and modify the registry, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/256986/ )Description of the Microsoft Windows registry
On a Microsoft Windows XP-based computer, you disable the Client for Microsoft Networks option for a dial-up connection to prevent access to shared resources. However, after you do this, the dial-up connection is still active. You can access shared resources even after you disable the Client for Microsoft Networks option.
To resolve this issue, prevent access to the shared resources through the dial-up connection. To do this, use one of the following methods.
Method 1: Use Windows FirewallYou can use Windows Firewall to block port numbers 139 and 145. This method prevents data packets from passing through these ports. For more information about how to use Windows Firewall to block ports, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/875357/ )Troubleshooting Windows Firewall settings in Windows XP Service Pack 2
Method 2: Configure the Windows registry after you disable NetBIOS over TCP/IP
How to disable NetBIOS over TCP/IP
How to configure registry settingsWarning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall your operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.
Method 3: Remove the "Client for Microsoft Networks" component