When installing the vSphere 5.1 client you may encounter the following error message “Failed to install hcmon“, if you look at the vminst.log file (which is normally located in the %TEMP% area) you will notice the following:-
After troubleshooting this issue I found that I required Microsoft .NET Framework 3.5.1 Service Pack 1 installed (or the feature wasn’t turned on) before installing the client.
- Install Microsoft .NET Framework 3.5.1 Service Pack 1
- Install the vSphere 5.1 client