Need help to open pdf files

I have a cd that I had for several years, and was able to use until last year.  Suddenly, Adobe Reader (I tried several versions, updates, patches, whatever!) said that each pdf to disk file is damaged.

This is a CD that has been able to start up on its own and had varied menus to join the final pdf pages.  I can't open the files through windows Explorer or through the menus.  Each time, the error message tells me the or files has been damaged because it was sent by e-mail or any other method that caused the damaged files.  The problem with this is that files and cd have never altered, as the cd is not rewritable.  It is also not hacked, if someone is going to ask this question.

The cd is a manual for my vehicle.  It has a parts manual and a workshop with other elements manual.  When the cd is put in the drive, it will automatically start, but failed to get a single file opened.  I tried this in two different systems, and I get the same results.  The strange thing is that I have files created in earlier versions of the player who still work.  So why not this one, and why not someone from Adobe available to help me straighten it?  Shame on them!

I am facing the similar problem. Not able to open some PDF files. Could open until 2-3 months back. Did an analysis that is not able to open files created with the previous version of the Adobe Reader 9.0. Also tried opening the same PDF files in the laptop computers of my colleagues and my PC at home. Without success.

NEED SERIOUS ATTENTION FROM ADOBE.

Tags: Acrobat

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