Gpprefcl.dll – Pre Service Pack 2 Revision History for Windows 7 SP1, Windows Server 2008 R2 SP1 and Windows Small Business Server 2011 (SBS 2011)
12-Jul-2013 – 6.1.7601.22382 – Gpprefcl.dll – x86/x64 – http://support.microsoft.com/kb/2869799 – Group Policy Preferences incorrectly sets a network printer as default in Windows 7 and Windows Server 2008 R2
02-Jul-2013 – 6.1.7601.22374 – Gpprefcl.dll – x86/x64 – http://support.microsoft.com/kb/2867625 – TCP port exhaustion causes key operations to fail when you deploy Group Policy preferences in Windows 7 SP1 or Windows Server 2008 R2 SP1
13-Feb-2013 – 6.1.7601.22249 – Gpprefcl.dll – x86/x64 – http://support.microsoft.com/kb/2693010 – Long startup or logon time on a Windows 7-based or Windows Server 2008 R2-based client computer when you apply a Group Policy preference that has OU filtering
04-Jul-2012 – 6.1.7601.22044 – Gpprefcl.dll – x64 – http://support.microsoft.com/kb/2693010 – Long logon time on a Windows 7-based or Windows Server 2008 R2-based client computer in a domain that uses Group Policy preferences to manage drive mappings
10-Feb-2012 – 6.1.7601.21920 – Gpprefcl.dll – x64 – http://support.microsoft.com/kb/2653810 – Security group filter in Group Policy Preferences does not remove a user from a group in Windows Server 2008 or in Windows Server 2008 R2
22-Nov-2011 – 6.1.7601.21864 – Gpprefcl.dll – x64 – http://support.microsoft.com/kb/2622802 – The Group Policy Client service crashes on a terminal server that is running Windows Server 2008 or Windows Server 2008 R2 when multiple users connect to the server at the same time
15-Jul-2011 – 6.1.7601.21771 – Gpprefcl.dll – x86/x64 – http://support.microsoft.com/kb/2561285 – You experience a long domain logon time in Windows 7 or in Windows Server 2008 R2 after you deploy Group Policy preferences to the computer
29-Jun-2011 – 6.1.7601.21759 – Gpprefcl.dll – x86/x64 – http://support.microsoft.com/kb/2551503 – A mapped drive that has the non-persistent flag set is displayed as a disconnected drive in Windows 7 or in Windows Server 2008 R2
11-May-2011 – 6.1.7601.21725 – Gpprefcl.dll – x86/x64 – http://support.microsoft.com/kb/2526870 – Windows Vista, Windows Server 2008, Windows 7, or Windows Server 2008 R2 may stop responding at the Welcome screen after you enter the user credentials to log on to the computer
15-Mar-2011 – 6.1.7601.21683 – Gpprefcl.dll – x86/x64 – http://support.microsoft.com/kb/2514376 – Power options do not work correctly in Windows 7 or in Windows Server 2008 R2 when you use Group Policy to configure the power plan in a domain