Consciousness off

"Yuck! Er, I mean good! But can she do the same?" Tim asked puzzled.
"No, son! The last thing she remembers is that she opened her front door and came face to face with her doppelgänger. Her doppelgänger who zapped her with some sort of device, and then everything went black!".
"Hmm... So what would happen if you were to boot up the old TabeaOS? Would she know you were there?".
"No! I would switch to being a background process in her mind, but compared to her my consciousness would still remain active and I will still able to influence her thoughts in any way I like, just not be in complete control like I am now! But she wouldn't be aware of my presence and don't be able to access my mind, that kind of firewall is part of the transfusion process actually. Wanna give it a try?".

"Sure, dad! But how do I boot up good ole' Tabea?".
"Well son there is a hard reset option..." Walter started.
"And how does that hard reset look like, Dad?".