When upgrading VDA version, the VDA installer eventually threw error message "XenDesktopSetup:summary msi install failed result: VdaMonitorPlugin_x64.msi:1603", pinpointing component 'VdaMonitorPlugin' installation failure.

In the affected VDA, "C:\Windows\System32\wbem" was somehow missed from Windows system variable "Path". That resulted in error 0x80070002 (missing or corrupted files) when VdaMonitorPlugin installer attempted to call Microsoft mofcomp.exe.

/* VdaMonitorPlugin installation log */
 CustomActionSchedule(Action=CompileResourceUtilizationMOF,ActionType=3073,Source=BinaryData,Target=WixQuietExec,CustomActionData="mofcomp.exe" "C:\Program Files\Citrix\Virtual Desktop Agent\Citrix_ResourceUtilization.mof")
WixQuietExec:  Error 0x80070002: Command failed to execute.
WixQuietExec:  Error 0x80070002: QuietExec Failed
WixQuietExec:  Error 0x80070002: Failed in ExecCommon method

The issue has been addressed by,

• Browser to Windows Environment Variables
• Double-click "Path" in "System variables" panel to enter the "Edit" page
• Add "C:\Windows\System32\wbem" back to system variable "Path".

The article describes a VDA installation failure caused by inappropriate Windows system variable "Path".