cant open adobe files

This is unusual. It suggests that really is what is in the file rather than a special message.

First thing to check: How did you save the file from your browser? Some people "save" by "printing to PDF" from the browser. You must not do this for this kind of file.

If you didn't do that: please use File > Properties on this file (in Reader or Acrobat) and look under the "Description" tab. You will see "Application" and "PDF producer". What does it say for these two things?

I get the same message when I open Acrobat and the select the file....I've tried everything I can think of.

I am able to open almost all .pdf filed, its these particular fillable form that some are able to be opened and others are not and i get this message.

Yes, I'm sorry they are .pdf files.

They are emailed to me - I download and "save as" to my desktop then try and open - I get a message that says - BUT I have the most updated version of adobe...I don't know what it is.  I have tried chrome, IE and firefox.  I have acrobat reader DC

"Please wait... If this message is not eventually replaced by the proper contents of the document, your PDF viewer may not be able to display this type of document. You can upgrade to the latest version of Adobe Reader for Windows®, Mac, or Linux® by visiting http://www.adobe.com/go/reader_download. For more assistance with Adobe Reader visit http://www.adobe.com/go/acrreader. Windows is either a registered trademark or a trademark of Microsoft Corporation in the United States and/or other countries. Mac is a trademark of Apple Inc., registered in the United States and other countries. Linux is the registered trademark of Linus Torvalds in the U.S. and other"

They are .pdf files, correct? If so, you should be able to open them just fine so maybe you can tell us how you are trying to open them? Are they saved to your computer? Are they online and you are clicking a link in a browser (if so, what browser)? What happens when you try and open them? What version of Reader do you have?