How to Resolve - Another end tag error - help!?

Another end tag error - help!

Just finished working on a major, and large document (76MB) - hit the save button for what I thought was the last time, and everything froze.
Restarted Word and now getting the end tag error and of course my file wont open.
Have tried the Microsoft Fixit
option and no joy.
I don't have maths equations - but do have lots of figures, captions etc.
Looked to try to edit the XML myself - but even that seems to be giving me errors.
Can anyone help?

Anwsers to the Problem Another end tag error - help!

Download SmartPCFixer to Fix It (Free)

• Download the Microsoft Windows ISO (installation device) from the following website:
  
• http://www.microsoft.com/en-us/software-download/windows10
• Users must select the appropriate ISO, either 32 bit or 64 bit, depending upon their individual computer.
• Extract the ISO file to a separate USB device or burn the program to a compact disc.
• Run the Microsoft Windows 10 upgrade directly from the software that you have thus created.

Recommended Method to Repair the Problem: Another end tag error - help!:

How to Fix Another end tag error - help! with SmartPCFixer?

1. Click the button to download Error Fixer . Install it on your computer.  Open it, and it will scan your system. The junk files will be shown in the list.

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