The Words Were Never Hidden
I was on site during a Windows 10 migration about eight years ago, and the group I’d cut over the previous day started coming to me with the same problem. They were opening files they’d opened the day before, and now some threw an error about a missing font and refused to open at all. Others opened with chunks of text gone, or the formatting pushed out of shape. The characters in those files were never damaged. Every letter was sitting there in the PDF and the file itself was fine, which is why the same documents opened without complaint on a machine that hadn’t been touched yet. What was missing was what turns those characters into shapes on a screen. ...