Scenario

After multiple attempts to install the Citrix Cloud Connector software we continued to receive even after mutiple reboots.

Installation was unsuccessful. See below for details.
A system restart is pending. The system must be restarted before any products can be installed.

Solution

Simple delete / clear the windows registry entry in HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\PendingFileRenameOperations