FamStars&Straps,

If not, the one that turned off your computer could have used a program to remotely control your pc (and he/she has deactivated the option to see him/her using your pc), or, if you tell me that you saw a box saying "HAHAHAH", then he/she could have used a trojan program, this is more sure for the box saying "HAHAHAH".

Bye.