when trying to attach a PDF as object on WORD 2013 64bit I am gettiing following error : "The program used to create this object is AcroExch. That program is either not installed on your computer or it is not responding. To edit this object, install AcroExch or ensure that any dialog boxes in AcroExch are closed." even disabled the protection mode on startup. That didn't make any difference
This issue occurs with 64 bit application as Acrobat is a 32 bit application making it incompatible to insert objects in a 64 bit MS Word application.
As a workaround insert the object as "Create New" instead of create from file.
Let me know if it helps.