I have a buddy that has a PC problem, he explained to me that he is running XP, and when he boots the PC up, he gets to the screen which gives him the option of booting "Normal", "Safe Mode", "Safe Mode with Prompts", etc....and no matter which selection he chooses the PC will reboot and go back to the selection screen.

Any suggestions on how to fix? I haven't seen the machines, this is on explaination.

Thanks in advance!