🚀 go-pugleaf

"Is it possible that the file I need is not in Acrobat Reader but only in the full Acrobat with which you can create a PDF file?" 

Yes, the "Create Adobe PDF" macro is a macro written by Microsoft. It becomes accessible in Word through a custom tool and File menu command with installation of the full version of Acrobat. 

I've seen similar error messages in Excel after uninstalling a different software package that did much the same thing (adding its own tool and command to Excel) so, to me, your error sounds familiar. 

So (someone will correct me if I'm wrong) it seems like the full Acrobat could have been installed on your new computer at some point and not fully cleaned up at uninstall; that an orphan file or maybe an .ini command is prompting Word to seek the "Create PDF" macro. 

(Is your computer actually new... or just new to you...?) 

That's still not much help, I'm sure, since I couldn't tell you how to find the orphan(s), if that's the problem, without installing separate maintenance software. 

But I think you're on the right track.