I am using Office 2013 (Word). The document I am working on is an old document that I have been using for well over a year. It is a running "to-do" list with check boxes. Before my current issue, I would check off the completed tasks for the week and then at the beginning of the next week, I would copy and paste the previous week's tasks, enter a new date at the top of the list, and simply delete the checked (completed) tasks. All of a sudden, when I go to delete a task, I receive the message "This modification is not allowed because selection is locked".
Most of the other answers to this problem (apparently a common problem) seem to revolve around the document being restricted (not in this case) or an issue with the Word version not being activated (not in this case). I am having no problems with any other Word docs, only this one.
EDIT: I just figured out that if I ONLY use the "backspace" key, I can delete the line (task) in question, but if I highlight the entire line and try to delete it I receive the same message.
Any help is appreciated!
Billiken