My dell laptob have a problem

Hi,
my laptop have windows 8 on it, 2weeks ago my hard disk has a problem and system was too slow and by formatting my whole hard drive it was okay but today when i was copy my stuff on it, it goes to be restarted and when it started a blue screen comes that this erorr is written on it:
"bad_system_ config_info"
and when restart and after that windows auto repair get over a black screen comes that mouse is on it but even after an hour windows don't get started.
what i most to do?