Windows Boot Error Code 0xC000000F: How to Fix It

Medium 30-60 minutes Medium Severity Verified June 2026
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Error Code
0xC000000F
Brand
Reddit Validated
Product Type
operating_system
Severity
Medium
DIY Difficulty
Medium
Estimated Fix Time
30-60 minutes
Error code 0xC000000F on Windows usually appears during boot and indicates that a critical system file is missing or corrupt. This often happens after a failed update, disk error, or incorrect shutdown. Don't worry — this guide will help you repair the boot configuration and get your PC running again.
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Tools You'll Need

How to Fix Error Code 0xC000000F

  1. Boot from Windows Installation Media

    If you don't have installation media, create one using another PC and Microsoft's Media Creation Tool.

  2. Open Command Prompt from Advanced Options

  3. Run Bootrec Commands

    If you get an 'Access denied' error on /fixboot, your system might use UEFI with GPT. Proceed to Step 4.

  4. Rebuild BCD with BCDEdit (if bootrec fails)

    Make sure to run these commands as administrator in the recovery environment.

  5. Run CHKDSK and SFC

    Do not interrupt the disk check; it may cause data loss.

  6. Restart and Test

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When to Call a Professional

If none of the above steps work, the issue may be a failing hard drive or corrupted system files beyond repair. Consider contacting a professional technician to diagnose hardware or perform a clean Windows reinstall.

Frequently Asked Questions

What causes error 0xC000000F in Windows?
This error occurs when the Boot Configuration Data (BCD) is missing or corrupt, or when a required boot file like winload.exe is missing. Common causes include disk errors, failed Windows updates, incorrect shutdowns, or malware.
Can I fix error 0xC000000F without a Windows installation disc?
You can use the built-in recovery options if they are available. At boot, press Shift+F8 repeatedly to access Advanced Startup Options. If that fails, you'll need installation media from another PC via Microsoft's Media Creation Tool.
Will I lose my data by fixing this error?
The steps in this guide do not delete personal files. However, running chkdsk or bootrec commands is safe for data. If you need to do a system reset, you can choose 'Keep my files' to preserve personal data.
What is the difference between bootrec /fixmbr and /fixboot?
/fixmbr repairs the Master Boot Record on legacy BIOS systems. /fixboot repairs the boot sector on the system partition. Both are needed to restore basic boot functionality.
How do I find my Windows drive letter in recovery?
In Command Prompt, type 'diskpart', then 'list volume'. Note the drive letter that contains 'Windows' in the Label column (often C: or D:). Type 'exit' to leave diskpart.

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