Well I have this laptop (Toshiba Satellite P-750) and very often it will come up with a blue screen error. Either one of CRITICAL_PROCESS_DIED or KERNEL_DATA_INPAGE_ERROR. I have a feeling that it is mostly the HDD. I have tried running a CHKDSK but every time I do it freezes on 27% and stays there. I have also tried fully reformatting to see if it will fix it with no luck at all.