Hi,
If the Building Blocks template file that comes with Microsoft Word is corrupt, it may cause Equations to not work correctly. To resolve this problem, move the damaged copy of the Building Blocks template out of the user data folder. After you do this,
Word creates a new Building Blocks template by using the default content.
To do this, please follow:
1. Exit all Office programs.
2. Open the file explorer and navigate to:
C:\Users\%username%\AppData\Roaming\Microsoft\Document Building Blocks\1033\15
Note: 1033 is the locale identification (LCID) number for English U.S version of Microsoft Office. For a list of locale ID numbers, see
Locale identification numbers for language-specific files.
3. Rename the Built-In Building Blocks.dotx
file to Built-In Building Blocks.old.
4. Then, navigate to
C:\Program Files\Microsoft Office\Office15\Document Parts\1033\15
5. Rename the Built-In Building Blocks.dotx file to
Built-In Building Blocks.old.
6. Close both folders.
7. Now, click Start, click Run, type
appwiz.cpl, and the click OK.
8. In the Currently installed programs list, right-click the version of the Office that is installed on the computer, click
Change, click Repair, and then click Continue.
9. Restart Word to check the result.
Regards,
Steve Fan
TechNet Community Support
It's recommended to download and install
Configuration Analyzer Tool (OffCAT), which is developed by Microsoft Support teams. Once the tool is installed, you can run it at any time to scan for hundreds of known issues in Office
programs.