Exchange 2007 Hub Transport can't uninstall

We migrated to Exchange 2013 and then shut down the old Exchange 2007 server as a test.  There was only one negative result and that was a 1 to 2 minute delay for the Outlook client to connect.  I started to uninstall Exchange 2007 and am stuck with trying to uninstall the Hub Transport service.  It fails with the error -

Unable to remove product with code 93fcff43-49e2-4ae5-9ad4-0256878ab886. The Temp folder is on a drive that is full or is inaccessible. Free up space on the drive or verify that you have write permission on the Temp folder. Error code is 1632. 

Not sure where the temp file is that is located.  The C:\temp is empty and there is 15 gb free on the C drive.

The administrator has full access and is the owner.  There are no quotas set up.  Same with the C:\Windows\Temp.

Tried to register diagnosticcomdletcontroller.dll and remove the watermark and action keys under HLKM\software\Microsoft\Exchange\v8.0\hubtransportrole but that did not help.