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From your description, I understand that some user cannot view docx files, the error message "Word App Encountered an Unexpected Error" was received. If there is any misunderstanding, please feel free to let me know.
Regarding this issue, I think it is more SharePoint issue, let’s contact our SharePoint forum.
Meanwhile, I also want to share a KB article with you.
How to troubleshoot problems that occur when you start or use Word 2010, Word 2007, Word 2003, or Word 2002
Not always a bad install of Silverlight. It works in Firefox but not on IE 8. It also works on IE in our test system with is http:. Our production system has the problem with IE 8 and htts:. Anyone know what IE setting that could be causing this issue?
- Edited by BDubs13065 Thursday, February 02, 2012 5:26 PM typo
I had the same error, but for me restarting the Client machine resolved the issue as in SharePoint logs their were Credentials issues like sp_portalapp with Claims Authentication.
Even if I change the browser it worked.
Thanks. Hope that helps.
Thanks and Regards, Parth