My hotmail has been changed to ‘outlook’ and now ‘corrects’ my spelling. How do I stop that? (I do not have, or want, an outlook ‘account’)

See title. When I try to find out how to disable the spell-check I am told to go into 'my outlook account'. Finding that, without my permission, 'Outlook' has indeed been put in my list of programs, I tried opening it and am variously told that my 'Trial version' has expired and I must buy a proper one, or asked to 'create' an e-mail account. (I already have a Hotmail one and want no other.) Thus there is no 'outlook account' to go into.

All I want to do is stop this officious automatic alteration of my spelling in e-mails. Please someone tell me how.