Svchost.exe – Pre Service Pack 2 Revision History for Windows Server 2008 R2 SP1, Windows 7 SP1 and Windows Small Business Server 2011 (SBS 2011)

18-Oct-2012 – 6.1.7601.22137 – Svchost.exe – x86/x64 – http://support.microsoft.com/kb/2775511 – An enterprise hotfix rollup is available for Windows 7 SP1 and Windows Server 2008 R2 SP1

01-Mar-2011 – 6.1.7601.21671 – Svchost.exe – x86/x64 – http://support.microsoft.com/kb/2510636 – An update that improves the startup performance of Windows 7 and of Windows Server 2008 R2 is available

01-Mar-2011 – 6.1.7601.17568 – Svchost.exe – x86/x64 – http://support.microsoft.com/kb/2510636 – An update that improves the startup performance of Windows 7 and of Windows Server 2008 R2 is available