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Office programs may crash with the FineReader add-in installed
If you have ABBYY FineReader installed and receive one of the following errors while either starting or using an Office program: Microsoft Excel 2013 has stopped working Microsoft Outlook 2013 has stopped working Microsoft Word 2013 has stopped...
Error Message when you try to open a document in Word: "The file contains custom XML elements which are no longer supported by Word."
Describes an issue in which a particular custom XML markup implementation is removed in Word 2007, Word 2010 and Word 2013.
Why is my add-in crashing? - InfoPath - Office.com
See what to do when you get a Data Execution Protection (DEP) message about an add-in you use.