Dear charl,
Good day! Thank you for posting your query in our community.
Based on your description, when you try to insert the bullets in Word document, Word app will become "not responding". I tested it on my side, and there was no problem.
To check whether the issue is related to the specific file, or the Word application, could you please try to create a new file to see if the problem happens again?
If it appears in all Word files, then it may be a problem with the Word client. You can try to fix Office client, by performing a repair. Try a quick repair first, and if that doesn't work, try the online repair.
And please provide screenshots of the error message and your Word product information(open Word >File>Account>capture a screenshot of the Product Information column) for me.
Additionally, you mentioned "my most important notes are all on microsoft word", to prevent data loss, please make a backup copy of your document, or you can upload the copy of the document to a cloud service like OneDrive.
Appreciate your cooperation in advance.
Sincerely,
Jazlyn | Microsoft Community Moderator
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