How to Fix the BlInitializeLibrary failed 0xc00000bb Error on Windows 11?

Need Relief from Windows 11 Black Screen? What Steps Ensure a Successful Fix for 0xc00000bb?

A black screen with “BlInitializeLibrary failed 0xc00000bb” means your computer can’t start Windows. The most common reasons:

• Startup settings in BIOS/UEFI are wrong
• Files needed for Windows to boot are broken or missing
• Hard drive or SSD is not working right
• You recently changed parts inside your computer

Steps to Fix the 0xc00000bb Error

Solution 1. Power Off and Reset BIOS/UEFI

1. Hold the power button until your computer shuts off.
2. Unplug the power cable and remove anything plugged in (mouse, USB, etc.).
3. Wait three minutes.
4. Plug in and turn your computer back on.
5. While it’s starting, tap the key to open BIOS/UEFI (usually F2, Del, Esc, or F10).
6. Find the option to “Load Setup Defaults” or “Restore Defaults.” Select it and save.
7. Check “Boot Order.” Make sure the drive with Windows is first.
8. Save and exit.

2. Turn Off Secure Boot and Try 4G Decoding

1. Still in BIOS/UEFI, look for “Secure Boot.”
2. Turn it to “Disabled” (often under Security or Boot tabs).
3. If you have more than one graphics card, enable “4G Decoding” if you see it.
4. Save and exit.

3. Repair Windows Boot Data

1. On another computer, download the Windows 11 Media Creation Tool from Microsoft’s site.
2. Use it to put Windows on a USB stick.
3. Insert the stick into the computer with the error, turn it on, and pick the USB stick to boot.
4. At Windows Setup screen, pick Repair Your Computer > Troubleshoot > Advanced Options > Command Prompt.
5. In Command Prompt, type and Enter, one by one:

   bootrec /fixmbr
   bootrec /fixboot
   bootrec /scanos
   bootrec /rebuildbcd

6. If you see “Access Denied,” type:

   bootsect /nt60 sys

7. then try the steps above again.

4. Edit a Setting in the Registry (If Needed)

1. Start your computer a few times and power off during the Windows logo. Do this until “Automatic Repair” starts.
2. Go to Troubleshoot > Advanced Options > Startup Settings > Restart > press 4 (Safe Mode).
3. Press Windows + R. Type regedit and Enter.
4. Go to:
   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management
5. On the right side, double-click ClearPageFileAtShutdown and change the value to 1.
6. Click OK and restart.

5. Use Automatic Repair or Reset

1. Boot from your Windows USB as above.
2. Pick Repair Your Computer > Troubleshoot > Advanced Options > Startup Repair.
3. If this doesn’t fix Windows, back up your files if possible and do a fresh install of Windows 11. This will delete everything, so use another computer or USB boot tool to save your data first.

6. Check for Failing Hardware

• Take out the drive with Windows and put it in another computer.
• Use free tools like CrystalDiskInfo or the drive maker’s own software to check for errors.
• If the drive is damaged, copy your files and replace the drive.
• New hard drives and SSDs often have a warranty.

Helpful Tips

• Always try to save important files before changing settings or reinstalling Windows.
• Don’t guess where things are in your BIOS—look up your computer or motherboard model for clear instructions.
• For downloads, always use Microsoft’s official website.
• Write down changes you make, so you can undo them if needed.

Small changes in BIOS or a drive that needs replacing can cause a big headache, but step-by-step you can get your computer running well again. Quick action and careful steps lead to a positive result.