computer wont load up

Its a gateway computer i am on it now but when i was on mypsace the moust froze and nothing else would work at all i turned off the computer with the power button restarted and it said Press F11 for system restore 3..2..1 or whatever well i tried to load up the computer and it wont work then i remeber i have Knoppix on a cd so i load knoppix and now my mom and sister are mad at me because they think i deleted my sisters file please help me fix this please or i will be grounded for something not my fault

ok after loading knoppix for a bit and restarting mr win xp finnally works i was worried

Computer will not load up past the F11 press to recover

here i am again on Knoppix and my computer froze with the mouse and nothing would work so i loaded the Knoppix live cd please i dont know why it keeps freezing help