It has now spread like a bad virus to Excel.
Copilot suggested two ways to stop it but neither of those work as the tick boxes are not there to 'untick'.
Any ideas please?
Word only: Note the restriction on the kind of Word and the version.

This is a very recent change to Office through Microsoft 365 consumer products (last week in the USA).
There have been a number of justified complaints and word is that they will be adding a switch to disable copilot to the other Applications in Windows and on the Mac. No word yet about the mobile apps on online version.
Add your voice using the feedback mechanisms.
This is a user-to-user support forum. -- You can give feedback TO MICROSOFT designers and decision makers on Microsoft Word or other Microsoft Products using their feedback mechanisms, (not here). (This is a link to directions.)