Perfnet.dll – Pre Service Pack 2 Revision History for Windows 7 SP1, Windows Server 2008 R2 SP1 and Windows Small Business Server 2011 (SBS 2011)
02-Aug-2012 – 6.1.7601.22077 – Perfnet.dll – x86/x64 – http://support.microsoft.com/kb/2740180 – Performance Monitor or a PDH function takes longer than expected to collect performance data on a computer that is running Windows 7 SP1 or Windows Server 2008 R2 SP1
13-Jul-2012 – 6.1.7601.22055 – Perfnet.dll – x86 – http://support.microsoft.com/kb/2733563 – You cannot query the Server Work Queues performance counter by using WMI in Windows Server 2008 R2
13-Jul-2012 – 6.1.7601.17899 – Perfnet.dll – x86 – http://support.microsoft.com/kb/2733563 – You cannot query the Server Work Queues performance counter by using WMI in Windows Server 2008 R2
Wmiperfclass.dll – Pre Service Pack 3 Revision History for Windows Vista SP2, Windows Server 2008 SP2 and Windows Small Business Server 2008 (SBS 2008)
15-May-2009 – 6.0.6002.22137 – Wmiperfclass.dll – x86/x64 – http://support.microsoft.com/kb/961435 – Some base values are not updated when you use the Win32_PerfRawData_PerfDisk_LogicalDisk WMI class to calculate performance data in Windows Vista or in Windows Server 2008
08-May-2009 – 6.0.6002.22131 – Wmiperfclass.dll – x86/x64 – http://support.microsoft.com/kb/970520 – The Wmiprvse.exe process creates a memory leak on a computer that is running Windows Server 2008 if you remotely monitor this process by using the WMI interface on a computer that is running Windows Server 2003 or Windows XP
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