Found my answer :
diagtrackrunner is found in update KB2952664 as listed here - https://support.microsoft.com/en-us/kb/2952664 - the uninstall from control panel results in system hanging on for 20+ minutes on "configuring Windows updates - Do Not turn off your computer - after 20 mins of this screen - I powered off and the system resumed the un-install and diagtrackrunner.exe was deleted as well as the parent folder.
Just an FYI in case anyone else has the issue.
Thank You