5.2. The Group Policy Engine
The Group Policy engine that shipped with Windows Server 2003 and Windows XP Group Policy was part of the Winlogon service, and the USERENV.DLL was used to log policy events to the %WINDIR%\Debug\UserMode folder along with other logon functions.
This new version of the Group Policy engine that ships with Windows Server 2008 and Vista is built differently. Group Policy now runs as its own service; Figure 5.1 shows the Group Policy Client service running in the Services MMC. If this service is disabled, Group Policies are not applied to the system. As a unified service, the new Group Policy architecture requires fewer services to start up to support the policy engine and therefore uses less memory and system resources ...
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