Click the Bullet list button in Word 2013 results in an error sometimes. This is due to a corrupted ListGal.DAT file.

To fix this issue – close all open Microsoft Office applications

Turn on the ability to view hidden files/folders

Close all office applications – then open Windows Explorer and navigate to this location:

C:\Users\%username%\AppData\Roaming\Microsoft\Word

Delete the ListGal.DAT file – then close Windows Explorer

Open Microsoft Word – click on the Bullet button and it should respond properly.