Original post : Your PC needs to be repaired: Fix for Windows 8, 8.1.
Recovery Your PC needs to be repaired The Boot Configuration Data for your PC is missing or contains errors. File: \boot\bcd Error code: 0xc000000f You'll need to use the recovery tools on your installation media. If you don't have any installation media (like a disc or USB device), contact your system administrator or PC manufacturer. Press Enter to try again Press F8 for Startup Settings Press Esc for UEFI Firmware Settings
Recovery Your PC needs to be repaired. An unexpected error has occurred. Error code: 0xc0000225 You'll need to use the recovery tools on your installation media. If you don't have any installation media (like a disc or USB device), contact your system administrator or PC manufacturer. Press Enter to try again Press F8 for Startup Settings Press Esc for UEFI Firmware Settings
If you don't have the original disc, go to Fix Your PC needs to be repaired with Easy Recovery Essentials
bootrec /FixMbr bootrec /FixBoot bootrec /ScanOs bootrec /RebuildBcd
bootrec /RebuildBcd
exit
diskpart
list part
Not sure? Easy Recovery Essentials can automatically detect problems with your active partition and automatically reconfigure the correct partition for you. No command line needed.
select partition x
x
active
quit