Petko -- I think I may have identified the problem. After reading the error message -- yeah, that was stupid, wasn't it? -- I checked the access permissions for the MyInfo Notebooks folder and discovered that I did NOT have Modify permission. When I renamed the file in Explorer I had to use the ...

Petko -- Thanks for the reply. I've attached the error message as a JPG file. Renaming the notebook using File Explorer worked fine. Thanks for the help.

Can the default "My Notebook" be renamed? If so, how? I tried right-click and Rename..., but got an error when I executed the rename. The notebook in question already has several sections with notes in it.

Thanks in advance for any help or answers.