9 Top Solutions to Fix Windows Stop Code 0xC000021A

Microsoft frequently releases Windows updates to address issues in older versions or eliminate bugs. However, these newer versions can sometimes introduce fresh bugs and unwelcome problems for users. One of the most common and frustrating errors across various editions is the Windows Stop Code 0xC000021A.

9 Solutions to Resolve Windows Stop Code 0xC000021A

This error hampers a user's ability to boot up their device and utilize it for intended tasks. It has also become a significant obstacle for many users who seek to complete their tasks efficiently. Are you keen on discovering the most effective solutions for this issue? This guide will walk you through 8 remedies to resolve this error.

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What is the Windows 10: Blue Screen of Death (BSOD) Error 0xC000021A?

0xC000021A is a common error known by various names, such as stop code or fatal error. It manifests as a blue screen displaying this error message, along with a notification stating, "Your PC ran into a problem and needs to restart." This indicates that the system has identified an issue with your device that requires resolution.

This Windows error is prevalent across all versions rather than being specific to any particular version. Regardless of which version you are using, you might have encountered this error. However, the key question is why this error occurs in all systems. Let us illustrate a few reasons behind this error to help you understand it better.

• Affected software or program involvement.
• Incompatible third-party applications.
• Damaged system registry.
• Incomplete loading of the library.

Undoubtedly, there can be numerous other reasons for the Windows Stop Code 0xC000021A. However, the aforementioned causes are considered the most prevalent culprits behind this particular error. Now, it's time to explore how to rectify these issues to resolve the error and continue using your device seamlessly.

Read Also: Blue Screen of Death Error 0x000000C5, Green Screen of Death

Additional Assistance: How to Recover Data Before Resolving Error 0xC000021A

Before addressing this Windows step error or any other error, we recommend installing recovery software. It's quite common to lose data while attempting to resolve such issues. The ideal approach is to have a recovery program in place before fixing any problem, ensuring that you can recover your data if it becomes lost.

Data Recovery Wizard Pro is one of the top-recommended programs for you. Irrespective of the Windows version you are using, it empowers you to retrieve your lost data. This software boasts a user-friendly interface that is compatible with all editions of Windows.

Aside from its versatile compatibility, this program boasts an array of features. It allows you to enjoy exceptional functionalities that may not be found in any other data recovery software. Let's swiftly explore its top features:

• This program can recover deleted files within just a few minutes. Its fast algorithm ensures a quick process.
• Your data will remain unaffected by this tool. It retrieves your files in their original format without altering them.
• You won't need to restart or reinstall Windows at any point during usage.
• The data recovery software features a user-friendly interface for ease of use.

Due to these advanced features, we recommend you choose Data Recovery Wizard WinPE. You will never be disappointed by using this product to recover your lost data.

Step 1. Select a drive and start scanning Choose a drive and initiate the scanning process.

1. Launch the "Data Recovery Wizard" tool. 2. Hover over the partition where your data was lost. This could be an internal hard disk, an external disk, a USB drive, or an SD card. 3. Click on "Scan" to initiate the scanning process.

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Step 2. Check and Preview Scanned Files

Utilize the file format filter located in the top-left or upper-right corner to refine the search results until you locate the required files. Once found, you can click the "Preview" button or double-click a file to preview its contents, should you wish to do so.

Step 3. Recover lost data to a secure location This step involves retrieving the lost data and saving it to a safe and secure place. Here's a detailed explanation: 1. **Identify the Source of Lost Data**: Determine where the lost data was originally stored, whether it be a hard drive, USB drive, memory card, or cloud storage. 2. **Use Data Recovery Software**: Choose a reliable data recovery tool, such as Recuva, tools Data Recovery Wizard, or Disk Drill. Download and install the software on a separate device to avoid overwriting any lost data. 3. **Connect the Damaged Device**: Connect the device containing the lost data to your computer. Ensure it's properly connected and recognized by your system. 4. **Launch the Data Recovery Software**: Open the data recovery application and follow the on-screen instructions. Most tools will have a simple wizard-based interface. 5. **Scan the Device**: Select the damaged device from the list provided by the software and initiate a scan. There may be different scanning options, such as quick scan (for recently deleted files) or deep scan (for more extensive searches). 6. **Preview and Select Files**: Once the scan is complete, the software will display a list of recoverable files. Preview the files to ensure they're the ones you need, and then select the ones you want to recover. 7. **Choose a Safe Destination**: It's crucial to save the recovered data to a different location than the original source to prevent potential damage or overwriting. Use an external hard drive, another internal drive, or a USB drive for this purpose. 8. **Start the Recovery Process**: Click on the 'Recover' or 'Save' button to begin the data retrieval process. The time taken will depend on the size of the files and the speed of your storage device. 9. **Verify the Recovered Data**: After the recovery is finished, check the saved files to confirm that they're accessible and complete. If necessary, use file repair tools to fix any corruption issues. 10. **Backup Your Data**: To prevent future data loss, establish a regular backup routine. Consider using cloud services like Google Drive or Dropbox, or invest in an external hard drive with automatic backup features. By following these steps, you can successfully recover your lost data and ensure its safety in a secure location.

Select the file by clicking the checkbox next to it, then click "Recover" to restore the lost data to a secure location. It's recommended that you do not save the recovered data on the same disk where it was initially lost.

9 Top Solutions to Fix Windows Stop Code 0xC000021A

From the discussion above, you should now have an understanding of the causes behind the Windows 10 Blue Screen of Death (BSOD) error code 0xC000021A. In this section, we will present some of the most effective solutions to help you fix this issue. Bear in mind that not every solution will work for everyone. It might be necessary to try all the following remedies to identify the one that suits your specific situation.

Follow along, and you can also learn how to fix this error by watching this video tutorial. In the video, the entire process is explained step-by-step.

• 0:25 Repair MBR and system file
• 1:25 Resolve BCD error

Method 1: Disconnect or Unplug All External Devices

As mentioned earlier, a frequent cause of this error is interference from external devices. Hence, you should attempt to resolve the issue by disconnecting each external device individually. The most effective approach is to examine all connected devices and systematically disconnect or unplug them.

You should try unplugging them and repeatedly restarting your device. If the error no longer appears, it indicates that the issue is caused by an external device. If your device still displays the Windows Stop error 0xC000021A, proceed to try the subsequent methods.

Method 2: Run the Windows Boot Repair Tool

If you encounter a blue screen error, the first step you can attempt is to utilize the Partition Master tool for boot repair. This utility creates a WinPE bootable disk and employs the "Boot Repair" function to rectify any boot errors present on the disks, ensuring the smooth operation of your system.

If your computer is unbootable now, begin with Step 1 here. If it's bootable, proceed to Step 3 and commence the process.

< strong >Step 1. Prepare a new PC and create a bootable media using Partition Master tools

1. On a new computer, plug an empty USB drive into your PC. 2. Install and launch the tool Partition Master. Navigate to the "Bootable Media" section, choose "Create bootable media," and then click "Next." 3. Select the empty USB or external disk as the target disk to create the bootable media for generating a Blue Screen error diagnostic tool.

Step 2. Boot the PC from the tools bootable USB

Next, connect the bootable USB drive to the PC experiencing the Blue Screen error. To boot from the USB, follow these steps: restart your PC, press the F2, F8, F11, or Del key (depending on your system) to enter BIOS, navigate to the Boot menu, set the USB as the primary boot device, save the changes, and then restart your PC.

Step 3. Enable Partition Master with its Boot Repair feature, and open the "Blue Screen" tool.

When Partition Master starts up, go to the Toolkit section and click "Boot Repair".

Next, click on "Blue Screen" and examine the listed Blue Screen error to view its details. Alternatively, you can enter a specific blue screen code or description to search for the corresponding solution to fix it.

Step 4. Resolve Blue Screen Error

• Now, you can proceed with the solution guide to eliminate the corresponding BSOD or blue screen issue from your computer.
• If that doesn't work, you can also click the "Live Chat" button to request remote assistance in resolving the issue with the aid of the technical support team.

Download this fully featured Windows Boot Repair Tool to solve your issue! You might also be interested in the following topics:

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Method 3: Repair Corrupted System Files from the Installation Media

Another effective method to消除这个蓝屏死机错误是通过修复系统的损坏文件。这个过程也很简单，可以通过简单的步骤完成。我们在下面的章节中讨论了这些步骤。

Important: You'll need to create a Windows Media Creation Tool and boot from it. After that, proceed with the following steps:

Step 1. Choose your preferred language. Next, click "Repair Your Computer."

Step 2. Click " Troubleshoot" and then select the advanced options. Click on "Command Prompt."

Step 3. Once the Command Prompt is open, type chkdsk C: /r and press Enter.

Step 4. Type sfc/scannow and press the Enter key.

After completing the above steps, make sure to restart your system. This allows your computer to finalize the changes to its operating system and will let you know if the error has been successfully resolved or not.

Method 4: Update Device Drivers to Resolve the BSOD Error

It's a prevalent tendency for many users to overlook device driver updates. Often, users neglect to update their drivers, which can result in this error and other issues. To resolve this problem, you can attempt to update your device drivers. Follow these steps to do so:

Step 1. Boot into Safe Mode in Windows 10.

Step 2. Right-click on the Start button to open the menu bar.

Step 3. Select Device Manager from the provided options.

Step 4. Double-click on the device option to open a new small window.

Step 5. Now, click on the 'Driver' option from the menu bar and select 'Update Driver.'

Step 6. Click "Search automatically for driver software".

Update Drivers to Fix Error 0xC000021A

Step 7. Tap on the option related to updates provided at the bottom of the new window.

It will begin updating the outdated drivers for your device to ensure it is up to date. It's possible that error 0xC000021A may have been resolved, and your system will start functioning smoothly.

Method 5: Reconstruct the Boot Configuration Data (BCD) to Resolve Error Code 0xC000021A

If you're encountering this error on Windows 10, it could be due to BCD (Boot Configuration Data). The reason lies in its responsibility for managing Windows 10 startup operations. To address this issue, try booting from the installation media and follow these steps: 1. Insert the Windows 10 installation media (USB drive or DVD) into your computer. 2. Restart your PC and enter the BIOS or UEFI settings by pressing the appropriate key (usually F2, F10, F12, or Del, depending on your system). 3. In the BIOS/UEFI menu, change the boot order to prioritize booting from the USB drive or DVD. 4. Save the changes and exit the BIOS/UEFI settings, which will initiate the boot process from the installation media. 5. You should now see the Windows Setup screen. Select your language and other preferences, then click "Next." 6. Click on "Repair your computer" located at the bottom left corner. 7. Choose "Troubleshoot" > "Advanced options" > "Command Prompt." 8. In the Command Prompt, type the following commands one by one, pressing Enter after each: - `bootrec /fixmbr` - `bootrec /fixboot` - `bootrec /rebuildbcd` These commands will attempt to repair the Master Boot Record (MBR), the boot sector, and the BCD store. 9. After executing the commands, restart your PC and remove the installation media. 10. Your computer should now start normally. If the error persists, you might need to consider performing a System Restore or a Clean Install of Windows 10. Please note that these steps are general guidelines, and the specific process might vary depending on your computer's model and configuration.

Step 1. Access the Troubleshoot menu. Search for Advanced Options, and then locate Command Prompt.

Step 2. Type the following command in the Command Prompt and press Enter.

• bootrec /fixmbr
• bootrec /fixboot

By following these steps, it is possible to resolve the Windows 10 Blue Screen of Death (BSOD) error code 0xC00021A. This is because the process will essentially rebuild the entire configuration of your Windows operating system, leading to a potential fix for the issue.

Method 6: Disable the Driver Signature Enforcement Feature

Many users download and install software that lacks digital signatures. This specific driver prohibits such software or programs from functioning properly. It may display this error, causing your device to repeatedly show the same issue. To resolve this, you should follow these steps to disable the driver: 1. Press the Windows key + X on your keyboard and select "Device Manager" from the menu. 2. In the Device Manager window, expand the category called "System Devices" or "Non-Plug and Play Drivers" (depending on your system). 3. Locate the driver that is causing the issue. It might be named something like "Driver Signature Enforcement Overrider" or a similar descriptive name. 4. Right-click on the driver and choose "Properties." 5. In the Properties window, navigate to the "Driver" tab. 6. Click on "Disable device" and then confirm any prompts that appear. 7. Restart your computer for the changes to take effect. After disabling the driver, you should be able to run unsigned software without encountering the error. However, keep in mind that using unsigned software carries potential security risks, as it may not have been verified by the operating system's security mechanisms.

1. Start your computer and continuously press F8 or F11. 2. Proceed to boot with the recovery option by navigating through the following menu: Troubleshoot > Advanced Options > Startup Settings > Restart. 3. Once the Startup Settings appear, keep pressing F7 to disable the driver, and then restart your system.

By following these steps, it is possible that the Windows Stop error 0xC000021A has been resolved. This is because it is regarded as the most common cause of this particular error.

Method 7: Reset BIOS to Resolve Error Code 0xC000021A

BIOS resetting can also be a solution to this error and protect you from other issues as well. To ensure safety, it's advisable to reset the BIOS of your device. Allow us to guide you through the process.

Step 1. In the troubleshooting menu, locate and select UEFI Firmware Settings.

Step 2. Tap on the Restart button to access the BIOS system.

Step 3. Look for the option "Reset Configuration Data" to achieve this.

Step 4. Save the new settings and restart your computer for optimal performance.

This is all you need to do to reset your device's operating system while keeping your data safe from any unauthorized access.

Method 8: Perform a System Restore to Resolve Error 0xC000021A

Another effective method to fix the Windows 10 Blue Screen of Death (BSOD) error code 0xC000021A is to perform a System Restore in Windows 10. After restoring, you should check if the error has been resolved. Here are the steps to safely restore your system: 1. **Boot into Safe Mode**: Restart your computer and repeatedly press the F8 key during startup to enter the Advanced Boot Options menu. Choose "Safe Mode with Networking" to access the internet if needed. 2. **Open System Restore**: Once in Safe Mode, click on the Start button, type "System Restore" in the search bar, and select "Create a restore point" from the results. In the System Properties window, click on the "System Restore" button. 3. **Choose a Restore Point**: In the System Restore wizard, click "Next" and then select a restore point that was created before the BSOD issue occurred. Make sure to choose a date when your system was functioning correctly. 4. **Verify Settings**: Review the selected restore point and ensure that the "Show more restore points" option is checked, if available. Click "Next" and then "Finish" to start the restoration process. 5. **Restore the System**: Windows will now begin the system restore process, which may take some time. Do not turn off your computer during this process. 6. **Reboot and Check**: After the restore is complete, restart your computer normally. The system should boot without encountering the 0xC000021A error. If the issue persists, you may need to consider other troubleshooting methods or seek professional assistance.

Step 1. Access Advanced Startup and search for "System Restore."

Step 2. Select a point to restore your system.

Step 3. Tap on the 'Next' button and follow the on-screen instructions.

Don't worry if you're not familiar with this process, as the on-screen instructions will be straightforward to follow. You can simply read through them once and proceed, without the need to search for video tutorials.

Method 9: Reinstall Windows 10 to Resolve Windows Stop Code 0xC000021A

If none of the above solutions work, the last resort you can attempt is to reinstall Windows 10. This will help you rectify any issues related to your device's operating system and ensure that you have a fresh, updated installation. To proceed with the reinstall, follow these steps:

1. Insert the CD/DVD or connect the USB for this installation. 2. Select "Create Installation Media (USB) for Another PC."

Now, you need to follow the on-screen prompts to install the new copy of Windows.

Conclusion

In the above blog, we have thoroughly discussed all the methods that can help you fix the Windows Stop Code 0xC000021A. Simply follow these methods step by step to restore your device to a smooth operating condition.

Remember not to quit the process until you've found the correct solution. It's possible that you may need to go through the steps of multiple fixes to identify the right one.

Windows Stop Code 0xC000021A Frequently Asked Questions

If you continue to experience issues, consult the Frequently Asked Questions for further assistance.

1. What does the error code 0xC000021A signify?

This particular error goes by several names, such as the Blue Screen of Death (BSOD), Windows Stop Code, and others. When this error occurs, your computer will display a blue screen with the message "Your PC ran into a problem and needs to restart."

2. How do you prevent the blue screen of death?

To stop BSOD Windows 10, you can follow the above list of fixes. Any of the aforementioned solutions will be beneficial for you.

3. What is a Green Screen of Death?

A Windows Green Screen is a specific error that can harm the fundamental components of your system and render your PC inaccessible.

4. How do I fix the kernel mode heap corruption? To address kernel mode heap corruption, follow these steps: 1. **Update your drivers and software**: Outdated or faulty device drivers can sometimes cause kernel mode heap corruption. Make sure all your drivers and operating system are up to date. 2. **Scan for malware**: Malicious software can tamper with system files, leading to corruption. Run a full system scan using a reputable antivirus program. 3. **System File Checker (SFC)**: Use the built-in Windows utility SFC (System File Checker) to scan for and repair corrupted system files. Open Command Prompt as an administrator and type: ``` sfc /scannow ``` Wait for the process to complete, and restart your computer if prompted. 4. **Windows Memory Diagnostic**: Check your RAM for errors by running the Windows Memory Diagnostic tool. Access it from the 'Settings' > 'Update & Security' > 'Troubleshoot' > 'Memory Diagnostics'. Restart your PC for the test to begin. 5. **Boot in Safe Mode**: If the issue persists, try booting your computer in Safe Mode. This can help isolate the problem by loading only essential services and drivers. 6. **Rollback driver updates**: If you recently updated a driver and started experiencing issues, roll back to the previous version. Go to Device Manager, find the problematic device, right-click, and select 'Properties' > 'Driver' > 'Roll Back Driver'. 7. **Check Event Viewer**: Analyze the Event Viewer logs for any error messages related to kernel mode heap corruption. These messages can provide clues about the source of the issue. 8. **Contact Support**: If none of the above steps resolve the issue, consider reaching out to Microsoft Support or a professional technician for further assistance. Remember that dealing with kernel-level issues can be complex and risky. It's always advisable to back up your important data before attempting any repairs.

There are various methods to address kernel mode heap corruption, but the most effective solution is to update your device drivers. It's crucial to continually update drivers associated with diverse areas or functions, such as graphics.