Can't open all my PDF files
Recently I tried Acrobat Pro DC 7day trial. After discontinuing I now can't open many of my PDF files on my Windows 10 computer, or many which come attached to emails. I uninstalled Acrobat Reader and then reinstalled it with no improvement. Also Reader tried to open Word files with the same error message. This is the message I get each time:

I never had problems opening files previously. Can you help please?
