Thanks for the info. This happens so infrequent that it would be a waste of time to modify every folder on the hunch that this is going to happen. I would say that this is the second time this year that this has happened. it can happen out of the clear blue. If it happens again, I'll try finks method, that is if can remember months ahead if & when it happens.
There has been times in the past that if I had a folder with stuff I didn't want to loose and was trying out software relevant to folder like renaming files or folders, then I would do jdc2000's method. Thanks again