One way unusual characters can be introduced is by copy and paste from another document e.g. a PDF.
Rather than using a command line tool that may not be available in Windows (and may corrupt any non-text file content e.g. embedded images), you can easily search for non-ASCII characters...
I’m trying to compressed a folder containing a combination of sub-folders and individual files. All the files are Word documents.
I’m having to rename some of the sub-folders as I’ve become aware that some characters have to be avoided. For example, MS have told me that apostrophes have to be...