Recover data from crashed computer : https://goo.gl/7xQWj8
Info: The Boot Configuration Data for your PC is missing or contains errors.
Windows Boot Manager: Windows Failed to Start. A recent hardware or software change might be the cause.
File: \Boot\BCD
Status code: 0xc000000f
Recommended solution to fix the problem:
Insert your Windows Installation disc or USB and restart your computer. Press F10 Key to see the Boot Menu and select the drive which contains operating system. Then choose your language settings and then click "Next". Now, you will see the option "Repair your computer" below the install button, click it. Windows icon starts loading with the message "Attempting Repairs". Attempting Repairs might take very longer, keep wait. Once repaired successfully you will see the sign in (user account) screen.
That's all Booting Windows 8 Problem solved.
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"***Note: One pointer I want to make known is that the command line at 5:22 should reflect the drive you use to boot windows, and C: isn't always the case. When you run diskpart, check and see which letter corresponds with your main boot drive, and replace the C in the 5:22 line with the correct letter.****"
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Fix BCD errors
Fix Files are missing errors
Refresh and repair is locked
If you played some mess with BCD and not able to boot into your operating system this is surely gonna help you out if repair and refresh isn't working.