Windows 10 Boot Error 0xc000000f: Repairing Missing Boot Configuration Data
A blue or black screen says “Your PC needs to be repaired” or “Windows failed to start,” with the code 0xc000000f. The Windows 10 boot error 0xc000000f stops the PC before YYPAUS Windows even begins to load.
The code points to the Boot Configuration Data, a small database that tells the boot manager where Windows is installed. If it is missing or damaged, the boot manager cannot continue.
The data can be rebuilt using recovery tools, usually without affecting personal files.
The screen usually offers only a couple of keys, such as Enter to try again or F8 for startup settings, and pressing Enter tends to bring the same error straight back.
What Usually Triggers It
The boot data is damaged or missing for these reasons:
- A sudden power loss or forced shutdown during startup.
- A USB drive or second disk is confusing the boot order.
- Disk errors on the system drive.
- Changes from disk utilities, dual-boot setups, or failed updates.
The error screen often mentions a file named \Boot\BCD, which confirms the cause.
First Steps to Try
Remove simple causes.
- Disconnect all USB drives, memory cards, and external disks.
- Check the BIOS boot order and make sure the internal drive is first.
- Restart the PC.
- If the screen offers “Press F8 for Startup Settings” or “Press Esc for UEFI Firmware Settings,” try the recovery options it provides.
- If Windows loops into the recovery environment, choose Startup Repair.
Removing an external drive left connected during startup fixes a surprising number of cases.
If the Problem Continues
Rebuild the boot data from installation media.
- On another PC, create a Windows 10 USB with the Media Creation Tool.
- Boot from it and select “Repair your computer.”
- Choose Troubleshoot > Advanced options > Startup Repair.
- If it fails, open Command Prompt and run bootrec /fixmbr, bootrec /fixboot, bootrec /scanos, and bootrec /rebuildbcd.
- Run chkdsk C: /f to fix file system errors, then restart.
On some UEFI systems, bootrec /fixboot reports “Access is denied.” In that case, bcdboot C:\Windows can recreate the boot files instead.
Protect Your Data First
Boot repair commands do not delete personal files, but type them carefully. If chkdsk reports a large number of errors, the drive may be failing, so prioritise copying your data. Avoid reinstalling Windows until you have tried the repair tools.
The Bottom Line
Error 0xc000000f means the boot configuration is missing or unreadable. Removing extra drives and running Startup Repair often fixes it, and rebuilding the BCD resolves most other cases.
Once the PC starts, create a recovery drive or keep the installation USB in a safe place. Boot errors like this one are far quicker to fix when the right tools are already to hand.