For the life of me, I cannot figure out why my partner's Lenovo Thinkpad laptop will not boot past troubleshooting options. She told me that she received a kernal data inpage (or input) error. Once that happened, she restarted the computer and it locked her out from logging in to her account, it stated "user profile not found". From there, when she restarted it, it tried to automatically repair, and failed. I have tried to troubleshoot the laptop. Resetting, nor refreshing worked. System restore and image restore did not work. Using the command prompt, I was unable to rebuild/fix the master boot record. I also cannot enter safe mode, I tried various ways... such as F8, shift F-8, shift windows F8. Any thoughts concerning this?