This is a list link to useful group policy files:

Remote Server Admin Tools

• Windows Vista http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=9ff6e897-23ce-4a36-b7fc-d52065de9960
• Windows Vista x64 http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=d647a60b-63fd-4ac5-9243-bd3c497d2bc5
• Windows 7  http://www.microsoft.com/downloads/details.aspx?FamilyID=7d2f6ad7-656b-4313-a005-4e344e43997d&displaylang=en
• Windows 8  http://www.microsoft.com/en-us/download/details.aspx?id=28972
• Windows 8.1 http://www.microsoft.com/en-us/download/details.aspx?id=39296

Client-Side Extensions Download Links

• Windows XP http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=e60b5c8f-d7dc-4b27-a261-247ce3f6c4f8
• Windows XP x64 http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=249c1aed-c1f1-4a0b-872e-ef0a32170625
• Windows Vista http://www.microsoft.com/downloads/details.aspx?familyid=AB60DC87-884C-46D5-82CD-F3C299DAC7CC&displaylang=en
• Windows Vista x64 http://www.microsoft.com/downloads/details.aspx?familyid=B10A7AF4-8BEE-4ADC-8BBE-9949DF77A3CF&displaylang=en
• Windows Server 2003 http://www.microsoft.com/downloads/details.aspx?familyid=BFE775F9-5C34-44D0-8A94-44E47DB35ADD&displaylang=en
• Windows Server 2003 x64 http://www.microsoft.com/downloads/details.aspx?familyid=29E83503-7686-49F3-B42D-8E5ED23D5D79&displaylang=en

Useful Tools

• Group Policy Preferences Migration Tool (GPPMIG) Download link http://www.microsoft.com/downloads/details.aspx?FamilyID=35791cb6-710b-48c4-aaa1-90db170bcf2a&displaylang=en
• Group Policy Settings References for Windows and Windows Server http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=18c90c80-8b0a-4906-a4f5-ff24cc2030fb
• Security Compliance Manager v3 http://www.microsoft.com/scm

Administration Templates

• IE 10 http://www.microsoft.com/en-us/download/details.aspx?id=37009
• Windows 8 / 2012 http://www.microsoft.com/en-us/download/details.aspx?id=36991
• Internet Explorer 11 ADMX http://www.microsoft.com/en-us/download/details.aspx?id=40905
• Windows 8.1 ADMX http://www.microsoft.com/en-US/download/details.aspx?id=41193

Group Policy Hotfixes

• BACKSPACE or arrow keys do not work in MMC on a computer that is running Windows 7 or Windows Server 2008 R2 http://support.microsoft.com/kb/2466373
• Folder Redirection policy is not applied to a network share after you update a Group Policy in Windows 7 SP1 or Windows Server 2008 R2 SP1 https://support.microsoft.com/kb/2799904
• Excessive network traffic after you enable the Background Sync and Transparent Caching Group Policy settings in Windows 7 or Windows Server 2008 R2 http://support.microsoft.com/kb/2810177/
• Windows 8 and Windows Server 2012 cumulative update: February 2013 http://support.microsoft.com/kb/2810177/
• Name of Group Policy preferences for Internet Explorer are displayed incorrectly in Windows 7 or Windows Server 2008 R2 http://support.microsoft.com/kb/2798787/
• Group Policy preferences client-side extension hotfix rollup for Windows Vista http://support.microsoft.com/?kbid=977983
• Client-Side Extension Hotfix Rollup http://support.microsoft.com/default.aspx/kb/974266
• User password is set to NULL when you use Group Policy Preferences to create a user account http://support.microsoft.com/?kbid=971357
• After you apply a GPO to redirect a folder to a new network share, the redirected folder is empty on client computers that are running Windows Vista or Windows Server 2008 http://support.microsoft.com/?kbid=977611
• Some templates are missing in Administrative Templates item after you enable a filter option by using the Group Policy Management Editor window on a computer that is running Windows Server 2008 http://support.microsoft.com/?kbid=949360
• LDAP filters in the Group Policy preference settings do not take effect on a computer that is running Windows Server 2008 R2 or Windows 7 http://support.microsoft.com/?kbid=976398
• FIX: You cannot apply Group Policy settings on a computer that is running Windows 7 or Windows Server 2008 R2 when security group filters are used in Group Policy preference settings http://support.microsoft.com/?kbid=976399
• Error message when a Group Policy client-side extension cannot log RSOP Data:”0x80041002″ http://support.microsoft.com/?kbid=977755
• Error message on a domain controller that is running Windows Server 2008: “The client-side extension could not remove user policy settings for ‘Domain Name {GUID}’ because it failed with error code ‘0x8007000d The data is invalid.'” http://support.microsoft.com/?kbid=977564
• The “Run only allowed Windows applications” Group Policy setting displays no entries on a computer that is running Windows Vista, Windows Server 2008, or Windows 7 http://support.microsoft.com/?kbid=976922
• The “Desktop Wallpaper” Group Policy setting is not applied in Windows 7 or in Windows Server 2008 R2  http://support.microsoft.com/kb/977944
• The “Configure new tab page default behavior” Group Policy setting does not work on a computer that is running Windows 7 or Windows Server 2008 R2 and that has Internet Explorer 8 installed http://support.microsoft.com/?kbid=980959
• The Group Policy preference settings for the “Terminal Session” item-level targeting item are not applied in Windows 7 or in Windows Server 2008 R2. http://support.microsoft.com/kb/981054
• You can still unpin a program from the taskbar unexpectedly when you enable the “Do not allow pinning programs to the Taskbar” Group Policy on a computer that is running Windows 7 or Windows Server 2008 R2. http://support.microsoft.com/kb/981177
• You cannot create a software installation Group Policy setting on a read-only domain controller in Windows Server 2008 R2. http://support.microsoft.com/kb/981265
• Error message occurs when you use GPMC to view a software restriction Group Policy setting in Windows 7 and in Windows Server 2008 R2: “An error has occurred while collecting data for Software Restriction Policies”. http://support.microsoft.com/kb/981750

If you want to keep track of all new Group Policy (and Active Directory) hotfixes yourself then check out the Microsoft AD team blog at  Ask the Directory Services Team