I have now been reading back through the pages on this forum, and I have come across what sounds like the same problem! https://www.msofficeforums.com/word/...-selected.html

Jamesh said that the only way the problem was solved was to delete the user profile. How is a user profile relevant, and how does it become affected in the first place?
I am worried about deleting my user profile because losing all my files and and settings etc. Is there not another way of addressing this problem? I hope so, phew.