How to remove Error message: Adobe Acrobat Reader DC could not open because it is either not a supported file type or because the file has been damaged (for example it was sent as an email attachment and was not decoded)?

1. Now adobe reader showing this error to us (attached).

2. Then open the PDF file using PDF-XChange Viewer Software Because this   

     software will show you the error

3. Then save as the PDF file to remove the error.

4. Done