1, hard disk problem, suggest to reinstall the system and try. If the system fails again, the hard disk may have bad tracks or motherboard problems; If it cannot be installed in the system, enter the second case; An alternative way is to use a good hard disk to eliminate this situation. )

2, the motherboard problem, card mark, indicating that the motherboard can not read hard disk data, specifically, the motherboard south bridge problem, this has to be repaired!