Solutions
-
LHookins's post in Remains of installation or unique paging file? was marked as the answerLook in the following folder...
C:\ProgramData\Package Cache
...for a numbered folder that's about 11 gig in size. That contains the files from the install download minus the actual install program which is one of the other numbered folders. I deleted this and got the space back. This was important because I only have 34 gig free on my SSD C: drive after the deletion.
It is not recommended to delete everything in the Package Cache folder.
Hook