There was an application that would read one of the huge files created when running Maintenance. I believe it was the CBS file. I can no longer remember or find it.
I found this for Windows 7, although it isn't an application, rather how to read what System File Checker (SFC) doesn't repair: The CBS.log file contains entries that some files are not repaired even after you successfully run the SFC utility on a Windows Server 2008-based computer (https://support.microsoft.com/en-us/help/954402/the-cbs-log-file-contains-entries-that-some-files-are-not-repaired-eve).
Thank you very much. That is exactly what I had forgotten.