Hello, this is documented in the PowerPath 6.1 release notes on page 17. It is required to support SHA-2 drivers as mentioned. If you want to avoid installing these MS hotfixes, you can run the CLI install with the NO_KBCHECK=1 option. This is also mentioned in kb [URL]  Regards, Michel.  [URL]…
While working to update PowerPath on 2008R2 servers PowerPath  installation fails saying it needs the listed hot fixes. KB2921916,KB3033929. Has anyone encountered this before?   Possible solutions or work around's other then the obvious... installation of the hot fixes. 
Power Path 6.1 install on Windows Server 2008R2