Error codes

0xc000000d

An invalid parameter was passed to the boot loader

What it means

The firmware or the boot manager handed Windows a value it cannot accept, so the boot stops before drivers load.

Common causes

• A damaged BCD store
• Firmware settings changed by an update
• A failing disk returning garbage

How to fix it

1. Start the PC from the Windows install stick or recovery drive, then choose Repair your computer > Troubleshoot > Advanced options > Command Prompt.
2. Open Startup Repair once; it rewrites the boot files it can identify as broken.
3. If that does not help, run bootrec /fixmbr, bootrec /fixboot and bootrec /rebuildbcd.