It is possible to deny those requests. The upgrade is listed a a scheduled event and you can cancel it. You could always roll back to 7 or 8. Windows 10 isn't that bad though. If you add this http
/www.classicshell.net/ and do a little more jiggery-pokery you may not even notice much of a difference. In response to the question, no, you cannot sue Microsoft for updating their software the license says they have a right to update especially when it was preventable.