Error codes

0xc000000f

Boot configuration data missing

What it means

The Windows Boot Manager is there, but its store (BCD) cannot be read, so it does not know what to start.

Common causes

• A deleted or damaged BCD store
• An update or cloning tool changed the partitions
• A failing boot drive

How to fix it

1. Boot from a Windows USB stick and open Troubleshoot > Advanced options > Command Prompt.
2. Run bootrec /rebuildbcd and accept the Windows installation it finds.
3. On a UEFI PC, also run bcdboot C:\Windows /s S: /f UEFI with S: as the EFI partition, if you are comfortable in diskpart.
4. Check the drive's health before trusting it with another install.