How to Fix Error Code 0xc0000001 on Windows 11

The error code 0xc0000001 on Windows 11 is one of those blue screen (BSOD) errors that can make your heart skip a beat. You’ll usually see it during startup, along with a message like: “Your PC couldn’t start properly. A required device isn’t connected or can’t be accessed.”

or, “The operating system couldn’t be loaded because a required file is missing or contains errors.”

In simple terms, this error means that Windows can’t find or load critical system files needed to boot properly. It could be caused by anything from corrupted boot files to faulty RAM or damaged system updates.

Don’t worry — in most cases, you can fix it yourself. In this guide, we’ll explain what causes error 0xc0000001 and walk you through several proven solutions to get your PC running again.

What Causes Error Code 0xc0000001 in Windows 11?

This error typically occurs during startup and can be caused by:

Corrupted or missing system or boot files
Faulty hardware (RAM, SSD, or cables)
Damaged Windows updates or incomplete installations
Corrupted BCD (Boot Configuration Data)
Bad drivers or malware infections
Sudden power failure or forced shutdown during updates

Now, let’s go through the step-by-step methods to fix it.

1. Perform a Simple Restart (If Possible)

Sometimes, the error may appear due to a temporary glitch — especially after a failed update or forced shutdown.

If you’re able to restart your PC, try doing that first:

Hold the power button to turn off your PC.
Wait for 10 seconds and then power it back on.

If the system boots normally afterward, the issue was likely a temporary file loading error. If not, proceed to the next steps.

2. Use Advanced Startup Repair

If your PC can’t boot to Windows, you’ll need to use the Windows Recovery Environment (WinRE).

Here’s how to access it:

Turn on your PC and, as soon as you see the Windows logo, hold the power button to force shutdown.
Repeat this 3 times, and Windows will automatically boot into the Automatic Repair screen.
Click Advanced options → Troubleshoot → Advanced options → Startup Repair.

Windows will scan your system for startup issues and attempt to fix them automatically.

After the process completes, restart your PC and check if the error is resolved.

3. Run System File Checker (SFC) and DISM

If system files are corrupted, you can use the SFC and DISM tools to repair them.

If you can boot into Safe Mode or the Command Prompt via recovery mode, follow these steps:

In the Advanced Options menu, select Command Prompt.
Type the following commands one by one and press Enter after each: sfc /scannow Wait for it to complete, then run: DISM /Online /Cleanup-Image /RestoreHealth
Once both scans finish, close Command Prompt and restart your PC.

This should fix any missing or damaged system files that could be causing the 0xc0000001 error.

4. Repair the Boot Configuration Data (BCD)

A corrupted Boot Configuration Data (BCD) file is one of the most common reasons for this error. You can rebuild it using Command Prompt in recovery mode.

Boot into the Windows Recovery Environment.
Select Troubleshoot → Advanced options → Command Prompt.
In the Command Prompt, type the following commands one by one: bootrec /fixmbr bootrec /fixboot bootrec /scanos bootrec /rebuildbcd
Once the commands complete, type exit and restart your PC.

If Windows successfully rebuilds the BCD, your system should boot normally again.

Tip: If you see “Access is denied” while running bootrec /fixboot, try running this command before repeating the steps:

bootsect /nt60 sys

5. Use System Restore (If Available)

If the error started after a recent update, driver installation, or software change, using System Restore can help.

Boot into Advanced Options → System Restore.
Choose a restore point created before the issue began.
Follow the prompts to complete the restoration.

After the process finishes, restart your computer. This will revert Windows settings and files to an earlier, stable state.

6. Test Your RAM and Hardware

Faulty RAM is a surprisingly common cause of the 0xc0000001 error. You can check for memory problems using Windows Memory Diagnostic.

Press Windows + R, type: mdsched.exe and press Enter.
Select Restart now and check for problems.

Your PC will reboot and automatically scan for memory errors. If it finds any, you may need to replace the faulty RAM module.

Also, ensure your storage drive (SSD/HDD) and cables are properly connected — a loose connection can sometimes trigger boot errors.

7. Uninstall Recent Windows Updates

If you started seeing the error after a Windows update, the update itself might be corrupt or incompatible.

You can uninstall it via the recovery menu:

Boot into Advanced Options.
Select Troubleshoot → Advanced options → Uninstall updates.
Choose Uninstall latest quality update or Uninstall latest feature update, depending on which was recently installed.

Restart your PC once the update is uninstalled.

8. Run CHKDSK to Repair Disk Errors

Disk errors can prevent Windows from reading critical boot files properly. Running the CHKDSK command helps fix file system corruption.

Open Command Prompt in recovery mode.
Type: chkdsk C: /f /r
Press Enter and wait for the scan to finish (it may take a while).

After it completes, restart your PC to check if the issue is resolved.

9. Reset Your PC (Last Resort)

If none of the above methods work, performing a system reset might be your best option.

Boot into Advanced Options → Troubleshoot → Reset this PC.
Choose Keep my files (if you don’t want to lose personal data).
Follow the on-screen instructions.

This will reinstall Windows while keeping your files intact — effectively fixing any corrupted system or boot files causing the issue.

Wrapping Up

The error code 0xc0000001 on Windows 11 can look intimidating, but it’s usually fixable without reinstalling your entire system. In most cases, rebuilding the BCD, running Startup Repair, or using SFC/DISM scans is enough to bring your PC back to life.

If you continue to see this error even after trying everything, your storage drive or RAM might be failing — in that case, back up your data immediately and consider replacing the hardware.

Once fixed, make sure to keep your system updated and avoid forced shutdowns during updates to prevent this issue from returning.