Excel: the file is corrupt and cannot be opened

I take 0 credit in this post, it is complete and utter rip from here:
http://www.ablebits.com/office-addins-blog/2011/11/30/excel-open-corrupt-files/
If you get this error:

1. Open the application.
2. Click on File -> Options.
3. Select Trust Center and press the Trust center settings button.
   
4. Pick Protected view.
   
5. Uncheck all the options under Protected View and confirm by pressing OK.
6. Restart Excel and try to open the broken Excel documents.

Back to my words.
This worked for me recently when a user couldn't open a document that everyone else could.  I tried opening and resaving the document, tried opening from different locations.  Different users saved it for her and sent it, nothing worked.  I found this gem at http://www.ablebits.com/office-addins-blog/2011/11/30/excel-open-corrupt-files/ and was able to resolve the issue.

Thanks again Ablebits!