How to forbid to kill process from under the guest?

Question

Information Security

Sometimes my computer is used as a guest. Well I make sure the guest can't disrupt the admin. In general process of the administrator was successfully killed from under the guest. wtf?

Answer 1

OS what though? Are you waiting for psychics?

Answer 2

This means that the access rights to the process do not indicate that guests CANNOT kill it. Since NTFS is right, roughly speaking. For services too