Welcome to Justanswer.com, my name is Dustin.I'm sorry to hear about the issue you are having, I will do my best to help you resolve it.
Hi, our automated assistant only gathers basic information. Im the person who will actually try to help you with the file.
before we even consider repairing the file or working on it, I need to ask you a few things.
Where did you get the file from, did someone email it to you? Or did you create it yourself on the computer?
Also, how long have you had the file and have you been working on it exlusively on this computer? Had you saved it on your computer before today?
And as close as you can do you remember the last day and hour when the file was working?
If the file was not created on your machine, then your machine wont have any of the previous version / autosave / temp / shadowcopy / files I would need.
For that reason, it would be better if you could simply send me the word file in question, via wikisend.com
Once you have uploaded the file to wikisend.com, send me the download link. And then I will directly on the single file that has the issue.