Why did my PDFs turn into secure files and how can I open them now?

Bill July 31, 2011

One day I went to open a PDF and it is now secure. Now I can’t open about a third of my files, mostly manuals. Any idea on why this would happen?

  1. Anonymous
    July 31, 2011 at 8:31 pm

    Disable Protected Mode by going to Edit > Preferences > General and deselecting Enable Protected Mode at startup.
    Restart Reader. 

  2. Tina
    July 31, 2011 at 8:06 pm


    what software did you use to open your PDF files? On what operating system is this?