My laptop won't boot up properly?

I turn it on, and it goes to a blue screen with a big. Face and says it has failed to start up properly and needs to repair. It then restarts and says it's preparing automatic repair. Then it says it's diagnosing. Then it ogre to another blue screen 'PC did not restart correctly, restart or press advanced options'. I have restarted it many times, is there a way to fix this without a separate disk or anything, maybe by using command prompts? Thanks
It's a lenovo laptop Y50-70 with windows 8.

Ah, my old Lenovo did the same thing. For mine, I only had to restart it a few times until it worked normally. Did you shut down during some kind of update? How many times have you had to restart it?

Contact Lenovo for the customer support that you have paid for, or Micro$oft.

Don't shut things off when it's doing possibly important things like that. You might have to reinstall Windows, or, you might have corrupted some files, or, nothing bad would happen at all.

From the sounds of it, call up someone that can help you, probably at Microsoft?

AT THE BOTTOM OF THE TEXT, THERE SHOULD BE SOME LINE THAT IDENTIFIES THE GENERAL PROBLEM! Please post it here if you get another blue screen!