Hotfix 961435 Not Installing On Windows Server 2008 R2

I'm using a monitoring tool installed on Windows Server 2008 R2 that utilizes the Win32_PerfRawData_PerfDisk_LogicalDisk WMI class.

Some calculations are not occuring correctly and all associated documentation points me to hotfix http://support.microsoft.com/kb/961435/en-us. Problem is, when I go to download this it only shows options for Vista, even though it states it's available for Windows Server 2008. I've tried downloading these and installing them, but I receive the error "the update is not applicable to your computer."

Can anyone provide any guidance or a hotfix for Windows Server 2008 R2? Any help would be greatly appreciated.

Thank you!