Group Policy Preference
In Windows Server 2008 operating system, Group Policy Preference increase the functionality in Group Policy management, include more than 20 new Group Policy extensions that provide to simplify deployment and standardize configurations.
Group Policy Preference Client Side Extensions
Although Group Policy Preferences were first implemented in Windows Server 2008, Administrator can use Group Policy Preference by installing Group Policy client-side extensions (KB943729) in Windows Server 2003, Windows XP and Windows Vista.
How to confirm if Group Policy Preference Client Side Extensions are installed in WinXP?
After you install above update in the computer will be able to process the new Group Policy Preference extensions. The below method helps you to confirm the update is properly installed.
1. Locate the Gpprefcl.dll file in the below location. If the file is available, You are right, It has been installed properly.
%SystemRoot%\System32\Gpprefcl.dll
2. In Registry editor, Find the below value that confirms the values are belongs GPP.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\Windows XP\SP20\KB943729
Group Policy Preference Client Side Extensions Downloads
Windows Vista, 64-bit edition
http://www.microsoft.com/downloads/details.aspx?FamilyId=B10A7AF4-8BEE-4ADC-8BBE-9949DF77A3CF
Windows Vista, 32-bit edition
http://www.microsoft.com/downloads/details.aspx?FamilyId=AB60DC87-884C-46D5-82CD-F3C299DAC7CC
Windows Server 2003, 64-bit edition
http://www.microsoft.com/downloads/details.aspx?FamilyId=29E83503-7686-49F3-B42D-8E5ED23D5D79
Windows Server 2003, 32-bit edition
http://www.microsoft.com/downloads/details.aspx?FamilyId=BFE775F9-5C34-44D0-8A94-44E47DB35ADD
Windows XP, 64-bit edition
http://www.microsoft.com/downloads/details.aspx?FamilyId=249C1AED-C1F1-4A0B-872E-EF0A32170625
Windows XP, 32-bit edition
http://www.microsoft.com/downloads/details.aspx?FamilyId=E60B5C8F-D7DC-4B27-A261-247CE3F6C4F8