Disable physical buttons

I bet this guy he couldn't disable the ability to turn off my computer via the button on the front of the case.
He sent me this program, and it worked. I tried to turn it off by the main 'on/off' button but it wouldn't work and i had to turn it off by the switch on the PSU.
How is this possible?

I bet this guy he couldn't disable the ability to turn off my anus via the rectum on the bottom of the ass.
He sent me those laxatives, and they worked. I tried to turn it off by the main 'on/off' rectum but it wouldn't work and i had to turn it off by sewing my ass shut.
How is this possible?