Rpcrt4.dll – Pre Service Pack 2 Revision History for Windows 7 SP1, Windows Server 2008 R2 SP1 and Windows Small Business Server 2011 (SBS 2011)
24-Dec-2013 – 6.1.7601.22550 – Rpcrt4.dll – x86/x64 – http://support.microsoft.com/kb/2916915 – Outlook may take two to three minutes to connect to an Office 365 mailbox
09-Jul-2013 – 6.1.7601.22380 – Rpcrt4.dll – x86/x64 – http://support.microsoft.com/kb/2849470 – MS13-062: Vulnerability in remote procedure call could allow elevation of privilege: August 13, 2013
09-Jul-2013 – 6.1.7601.18205 – Rpcrt4.dll – x86/x64 – http://support.microsoft.com/kb/2849470 – MS13-062: Vulnerability in remote procedure call could allow elevation of privilege: August 13, 2013
11-Jul-2012 – 6.1.7601.22054 – Rpcrt4.dll – x86/x64 – http://support.microsoft.com/kb/2734410 – RPC client application stops responding on a computer that is running Windows Server 2008 R2 or Windows 7
05-Nov-2011 – 6.1.7601.21855 – Rpcrt4.dll – x86/x64 – http://support.microsoft.com/kb/2619234 – A hotfix is available to enable the Association Cookie/GUID that is used by RPC over HTTP to also be used at the RPC layer in Windows 7 and in Windows Server 2008 R2
29-Oct-2011 – 6.1.7601.21849 – Rpcrt4.dll – x86/x64 – http://support.microsoft.com/kb/2637692 – RPC threads may stop responding in Windows 7 or in Windows Server 2008 R2
06-Jan-2011 – 6.1.7601.21635 – Rpcrt4.dll – x86/x64 – http://support.microsoft.com/kb/2457402 – You experience delays with an application or service that uses NTDSA APIs for passing changes from RWDC data centers to RODC data centers