Fairly an urgent problem!?

I was watching porn on the laptop, and it suddenly goes black and turns off. Well, i turned it on andon again, it said " Logging into the computer fail fail", so i press the shut down button on the keyboard, coz i couldnt do it from the screen, and they say "Repair problems" or "Go in automatically". since the go i n automatically didnt work, i pressd repair problems, and it took about half an hour, and they said, windows couldnt repair the problems, see solutions, then it says log in to windows, and after lkaunching and everything, the screen stops and turns black, and i repeated the same damn thing for an hour, and did nt work. The thing is, that my dad repairs all our computers, since he works in these stuff. Am afraid i give him the laptop to fix and he sees what i was dojng. Do the tabs of porn go away, i mean, does the browser shut off when the laptop turns off? anws, my dad uses another browser, but am afriad they will pop up were they were, like, nthng changed, and they are still there when he logs in again. Help! and if u knw how to fix this, plz tell me.