Dhcpcore.dll – Pre Service Pack 2 Revision History for Windows 7 SP1, Windows Server 2008 R2 SP1 and Windows Small Business Server 2011 (SBS 2011)
11-Mar-2013 – 6.1.7601.22277 – Dhcpcore.dll – x86/x64 – http://support.microsoft.com/kb/2824546 – Incorrect DHCP packet is sent when DHCP client receives a DHCP offer on a Windows 7 SP1-based or Windows Server 2008 R2 SP1-based computer
18-Oct-2012 – 6.1.7601.22137 – Dhcpcore.dll – x86/x64 – http://support.microsoft.com/kb/2775511 – An enterprise hotfix rollup is available for Windows 7 SP1 and Windows Server 2008 R2 SP1
09-Oct-2012 – 6.1.7601.22130 – Dhcpcore.dll – x86/x64 – http://support.microsoft.com/kb/2763523 – No network connectivity on Windows 7-based or Windows Server 2008 R2-based client computers when a DHCPv6 message is sent that has a duplicated DUID
13-Aug-2011 – 6.1.7601.21789 – Dhcpcore.dll – x86/x64 – http://support.microsoft.com/kb/2459530 – Event ID 5719 and event ID 1129 may be logged when a non-Microsoft DHCP Relay Agent is used
19-May-2011 – 6.1.7601.21730 – Dhcpcore.dll – x86/x64 – http://support.microsoft.com/kb/2554766 – A VPN session works incorrectly during deployment of Windows 7 SP1 or Windows Server 2008 R2 SP1, and deployment fails
20-Nov-2010 – 6.1.7601.17514 – Dhcpcore.dll – x86/x64 – http://support.microsoft.com/kb/2763523 – No network connectivity on Windows 7-based or Windows Server 2008 R2-based client computers when a DHCPv6 message is sent that has a duplicated DUID