|I will assume you tried the Detect & Repair and that did not work.|
Shut down Word and try removing the normal.dot file.
Do a Search, it should be someplace like:
It is a hidden/system file so make sure to check the Advanced options in Search.
Just delete the file. When you restart Word it will automatically be recreated.
You will lose any setting you may have made like, AutoText entries, custom toolbars, and macros.
If these are extensive, you can just rename the file and copy the data over to the new file later.