Well, yesterday after my failed 'save' experience, I ran into a new issue. (I am not running any file cleaners or other hard drive utilities).
This time, I saved and C2 hung with the 'Saving' dialog box running perpetually. I had to use Task Manager to terminate the program. It shows 'Saving auto-backup file...' in the bottom -- this is a shot of my 'crash'....
There are clearly problems with C2 in the saving and backup features. ... Thankfully, after yesterday's experience, I have good backup system.
... What will tomorrow bring?