If someone were to break in to high school, would an alarm go off?
That's a wall. - Kasey C, PC guru since Apple II days KEEP OUT! Trespassers will be violated!
Do you think he wants to access your computer? For what purpose? Are you paranoid or what? If anything you need to fear a software developer potentially as they could add a back door but that is why you should use a firewall, and a router to protect yourself.
No, I really don't, and I think anyone who does think that's likely wants to get their head checked as their paranoia is running right out of control.
He might have a hidden back door in each copy of windows that nobody knows about.