shep 0 Newbie Poster

Hi,
My Compaq Presario will not boot, I was watching a video from a safe website (www.scarletknights.com) and it froze. I turned the power off and when i restarted it it goes to load windows XP and then to the screen where i can select safe mode, last known good configuration or start windows normally. Any option i select leads me back to the same place, HELP!!!