I suggest you read the EULA. My *guess* is that you will agree to the changes being made.

>My Office 365 is coming to end of the first year. So I need to renew the subscription. I see the button Buy in Outlook. But when I click, MS asks if it is ok to make changes to this computer. I don't trust MS as they may start upgrading OS too. Is there a way to Renew Subscription without having MS making changes to my PC?