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Troubleshooting Group Policy Client-Side Extension Behavior
Article ID: 216358 - View products that this article applies to.
This article was previously published under Q216358
NoticeThis article applies to Windows 2000. Support for Windows 2000 ends on July 13, 2010. The Windows 2000 End-of-Support Solution Center
(http://support.microsoft.com/?scid=http%3a%2f%2fsupport.microsoft.com%2fwin2000)is a starting point for planning your migration strategy from Windows 2000. For more information see the Microsoft Support Lifecycle Policy
When a group policy is being processed on a Windows-based computer, client-side extensions are the components that interpret the stored policy and make the appropriate changes to the environment. In troubleshooting a given extensions' application of policy, the administrator can view the configuration parameters for that extension. These parameters are in the form of registry values.
Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/322756/ )How to back up and restore the registry in Windows
Each client-side extension is identified by a subkey beneath the following path:
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\GPExtensionsThe subkey name takes the form of a Globally Unique Identifier (GUID). For more information about identifying registered group policy client-side extensions, see the following article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/216357/EN-US/ )Identifying Group Policy Client-Side Extensions
Registry Values for Client-Side ExtensionsThe following registry values may be present for each client-side extension. Note that some of these values may not be present. In this case, the default specified is used by the client extension.
Data: <Client-side extension DLL>
Data: The function within the client-side extension to be called when group policy processing is passed to this extension.
Purpose: Determines whether or not the client extension will process a group policy when a machine policy is being applied.
Purpose: Determines whether or not the client extension will process a group policy when a user policy is being applied.
Purpose: Determines whether or not the client extension will process a group policy when a slow link is detected.
Purpose: Determines whether or not the client extension will process a group policy when a background refresh of the group policy occurs.
Purpose: Determines whether or not the client extension will process a group policy when there are no changes between the cached list of GPOs previously processed and the current list.
Purpose: If enabled, user policies are cached on a per-user and per-machine basis.
Purpose: If enabled, requires the successful registration of client-side extension components to occur before it processes a group policy.
Purpose: Determines whether or not a group policy will continue processing while the client extension is performing operations.