@Mary Gardner
Please check what version of Office are you using now?
I suggest you run Word in safe mode to check this issue.
- Enter Win+R to open Run dialog, enter "winword /safe", click OK.
- Create a new blank document, check this issue.
If this issue is reproduced in Safe Mode, please refer to JohnKorchok's answer, perform a Online Repair from control Panel for Office.
If this issue does not occur with Safe Mode, please go to Word > Options > Add-ins > Manage, COM Add-ins > Go, clear the check boxes for any enabled COM add-ins, select OK, then check this issue again.
It's also recommended to update Office to have a check.
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