February 21, 2024

Welcome to our article on the top 10 solutions to resolve the notorious Windows Stop Code 0xC000021A. Delve into this insightful compilation that offers effective remedies to combat this frustrating error and restore your Windows operating system to its optimal functionality.

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Update your operating system: Ensure that your operating system is up to date with the latest patches and bug fixes. Many stop codes, including oxc00021a, can be resolved by simply installing the latest updates.

Introduction to Windows Stop Code 0xC000021A

If you’re experiencing the Windows Stop Code 0xC000021A error on your PC, we’ve got you covered with our top 10 solutions to fix this issue. Follow these steps to resolve the error and get your computer back up and running smoothly:

1. Restart your PC: Sometimes a simple restart can resolve the issue.

2. Enter Safe Mode: Start your PC in Safe Mode to troubleshoot the error.

3. Use System Restore: Roll back your system to a previous point before the error occurred.

4. Check for Windows Updates: Make sure your operating system is up to date.

5. Update your drivers: Outdated or incompatible drivers can cause this error. Update them using Device Manager.

6. Scan for malware: Use a reliable antivirus program to scan your PC for any malware or viruses.

7. Repair system files: Use the built-in System File Checker tool to fix any corrupted system files.

8. Uninstall recently installed software: If the error started after installing new software, uninstall it and check if the error persists.

9. Perform a clean boot: Temporarily disable third-party services and startup programs to identify any conflicts.

10. Seek professional help: If none of the above solutions work, consider contacting Microsoft Support or a professional technician for further assistance.

The oxc00021a stop code is a critical system error that demands immediate attention and troubleshooting to prevent further damage.

Understanding the Reasons Behind Stop Code 0xC000021A Error

The stop code 0xC000021A error is a common issue that can cause your computer to crash and display the infamous blue screen of death (BSOD). This error can occur on various versions of Windows, including Windows 10, Windows 8, Windows 7, and even Windows XP.

One of the main culprits behind this error is a file called Csrss.exe, which is responsible for managing certain features and functions of the Windows operating system. When this file becomes corrupted or encounters a problem, it can trigger the stop code 0xC000021A error.

To fix this issue, there are several steps you can take. First, try booting your computer into safe mode and uninstall any recently installed software programs that may be causing conflicts. You can also use a tool like EaseUS Data Recovery Wizard to recover any lost data.

If these steps don’t resolve the issue, you may need to perform a system restore or reinstall Windows to fix any underlying problems. Remember to back up your important files before attempting any major changes to your system.

Solutions to Fix the Stop Code 0xC000021A Error

  1. Open the Advanced Startup Options menu by restarting your computer and pressing the F8 key repeatedly.
  2. Select Repair Your Computer and press Enter.
    Open the Advanced Startup Options menu by restarting your computer and pressing the F8 key repeatedly.
Select Repair Your Computer and press Enter.
  3. Choose your preferred language and log in as an administrator.
  4. In the System Recovery Options window, select System Restore and click Next.
  5. Select a restore point prior to encountering the 0xC000021A error and click Next.
  6. Confirm the restore point selection and click Finish.
  7. Wait for the restoration process to complete and then restart your computer.
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Solution 2: Run System File Checker (SFC) Scan

  1. Open Command Prompt as an administrator.
  2. Type sfc /scannow and press Enter.
    Open Command Prompt as an administrator.
Type sfc /scannow and press Enter.
  3. Wait for the scan to finish. If any corrupt system files are found, they will be automatically repaired.
  4. Once the scan is complete, restart your computer.

Solution 3: Update or Rollback Drivers

  1. Open Device Manager by pressing Win + X and selecting Device Manager.
  2. Expand the categories and locate the problematic driver.
    Open Device Manager by pressing Win + X and selecting Device Manager.
Expand the categories and locate the problematic driver.
  3. Right-click on the driver and choose Update Driver to search for the latest version online. Alternatively, select Roll Back Driver if you recently updated the driver.
  4. Follow the on-screen instructions to complete the driver update or rollback process.
  5. Restart your computer after the driver update or rollback is finished.

Solution 4: Run the Windows Memory Diagnostic Tool

  1. Press Win + R to open the Run dialog box.
  2. Type mdsched.exe and press Enter.
  3. Select Restart now and check for problems (recommended).
  4. Wait for the memory diagnostic to complete. Your computer will automatically restart.
    Select Restart now and check for problems (recommended).
Wait for the memory diagnostic to complete. Your computer will automatically restart.
  5. Check the results after your computer restarts to determine if any memory issues were detected.

Solution 5: Perform a Clean Boot

  1. Press Win + R to open the Run dialog box.
  2. Type msconfig and press Enter.
  3. In the System Configuration window, navigate to the Services tab.
  4. Check the Hide all Microsoft services box and click Disable all.
    In the System Configuration window, navigate to the Services tab.
Check the Hide all Microsoft services box and click Disable all.
  5. Go to the Startup tab and click Open Task Manager.
  6. In the Task Manager, disable all startup programs by right-clicking on each one and selecting Disable.
    Go to the Startup tab and click Open Task Manager.
In the Task Manager, disable all startup programs by right-clicking on each one and selecting Disable.
  7. Close the Task Manager and go back to the System Configuration window.
  8. Click OK and restart your computer.

Solution 6: Uninstall Recently Installed Programs or Updates

  1. Press Win + X and select Apps and Features.
  2. In the Apps & Features window, sort the installed programs by Installed On date.
  3. Identify any recently installed programs or updates that might have caused the error.
  4. Select the program or update and click Uninstall.
  5. Follow the on-screen instructions to complete the uninstallation process.
  6. Restart your computer after the uninstallation is finished.
    Follow the on-screen instructions to complete the uninstallation process.
Restart your computer after the uninstallation is finished.

Solution 7: Check Disk for Errors

  1. Open Command Prompt as an administrator.
  2. Type chkdsk C: /f /r and press Enter.
    Open Command Prompt as an administrator.
Type chkdsk C: /f /r and press Enter.
  3. Confirm the disk check by typing Y and press Enter.
  4. Restart your computer and wait for the disk check to complete. This process may take some time.

Solution 8: Repair Corrupted System Files

  1. Open Command Prompt as an administrator.
  2. Type dism.exe /online /cleanup-image /restorehealth and press Enter.
  3. Wait for the repair process to finish. This may take a while.
  4. Once the repair is complete, restart your computer.

Solution 9: Disable Automatic Restart

  1. Press Win + X and select System.
  2. In the System window, click on Advanced system settings.
  3. Under the Startup and Recovery section, click on Settings.
  4. Uncheck the Automatically restart option and click OK.
    Under the Startup and Recovery section, click on Settings.
Uncheck the Automatically restart option and click OK.

Solution 10: Reinstall Windows

  1. Backup all your important files and data.
  2. Insert the Windows installation media (DVD or USB).
    Backup all your important files and data.
Insert the Windows installation media (DVD or USB).
  3. Restart your computer and boot from the installation media.
  4. Follow the on-screen instructions to reinstall Windows.

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Disconnect or Unplug All External Devices

Disconnecting or unplugging all external devices can help resolve the Windows Stop Code 0xC000021A error. This error, commonly known as the blue screen error or BSOD, can occur due to various reasons such as software bugs, incompatible devices, or corrupt system files. To fix this issue, follow these steps:

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1. Turn off your computer and disconnect or unplug any external devices connected to it, such as USB drives, printers, or external hard drives.
2. Restart your computer and check if the error still occurs.
3. If the error persists, try booting your computer in Safe Mode by pressing the F8 key during startup.
4. In Safe Mode, go to the Device Manager and uninstall any recently installed software or drivers.
5. Restart your computer again and check if the error has been resolved.

By disconnecting or unplugging external devices, you can eliminate any potential conflicts or compatibility issues that may be causing the Stop Code 0xC000021A error.

Repair Corrupted System Files

Repairing corrupted system files can help resolve the Windows Stop Code 0xC000021A error and prevent further issues. Here are some steps to fix this error:

1. Boot into Safe Mode by restarting your computer and pressing the F8 key repeatedly until the Advanced Boot Options menu appears.
2. Select “Safe Mode with Command Prompt” and press Enter.
3. In the Command Prompt window, type sfc /scannow and press Enter. This will scan and repair any corrupted system files.
4. If the scan doesn’t fix the issue, try running the DISM tool. In the Command Prompt, type Dism /Online /Cleanup-Image /RestoreHealth and press Enter.
5. Restart your computer after the repair process completes.
6. If the error persists, you can try using third-party software like EaseUS Data Recovery Wizard to recover any lost or corrupted files.
7. If none of the above methods work, you may need to reinstall Windows to completely resolve the issue.

Update Device Drivers

To update device drivers in Windows and fix the Stop Code 0xC000021A error, follow these steps:

1. Open Device Manager: Press Windows key + X, then select Device Manager from the list.

2. Expand the category: Locate the device category that may be causing the error, such as Display adapters or Sound, video and game controllers.

3. Update the driver: Right-click on the device, select Update driver, and choose Search automatically for updated driver software.

4. Install the driver: If an update is found, follow the on-screen instructions to install it.

5. Repeat for other devices: Repeat steps 2-4 for any other device categories that may be causing the error.

6. Restart your computer: After updating all necessary drivers, restart your computer to apply the changes.

Updating device drivers can often resolve the 0xC000021A error and improve system stability.

Rebuild the Boot Configuration Data (BCD)

To rebuild the Boot Configuration Data (BCD) and fix the Windows stop code 0xC000021A error, follow these steps:

1. Boot your computer using a Windows installation media.
2. On the installation screen, click “Next” and then select “Repair your computer.”
3. Choose “Troubleshoot” and then select “Command Prompt.”
4. In the Command Prompt window, type “bootrec /fixmbr” and press Enter.
5. Next, type “bootrec /fixboot” and press Enter.
6. Finally, type “bootrec /rebuildbcd” and press Enter.
7. When prompted, select the Windows installation you want to repair and press Enter.
8. Restart your computer and check if the error is resolved.

Rebuilding the BCD can help resolve issues related to the boot configuration, including the stop code 0xC000021A. This process is compatible with various Windows versions, including Windows 10, 8, 7, and even XP.

Disable the Driver Signature Enforcement Feature

To disable the Driver Signature Enforcement feature on your Windows system and resolve the Stop Code 0xC000021A error, follow these steps:

1. Restart your computer and enter the Advanced Startup Options menu by pressing F8 or Shift+F8 during boot.

2. Select “Troubleshoot” and then “Advanced options.”

3. Click on “Startup Settings” and then “Restart.”

4. Once your computer restarts, press F7 to disable Driver Signature Enforcement.

5. Continue booting into Windows.

Disabling Driver Signature Enforcement allows you to install or run unsigned drivers, which may help resolve compatibility issues or errors like the Stop Code 0xC000021A. However, keep in mind that disabling this feature can expose your system to potential security risks. Only install or run drivers from trusted sources.

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If disabling Driver Signature Enforcement does not resolve the issue, consider trying other solutions from our Top 10 Solutions guide.

Reset BIOS

To reset the BIOS and resolve the Windows Stop Code 0xC000021A error, follow these steps:

1. Power off your computer.

2. Unplug the power cord and any other connected cables.

3. Open the computer case and locate the CMOS battery.

4. Carefully remove the CMOS battery from its socket.

5. Wait for about 5 minutes to allow the BIOS settings to reset.

6. Insert the CMOS battery back into its socket.

7. Close the computer case and reconnect all cables.

8. Power on your computer and enter the BIOS setup.

9. Verify and adjust any necessary settings.

10. Save the changes and exit the BIOS setup.

This process will reset the BIOS to its default settings, which can help resolve the Stop Code 0xC000021A error and allow your computer to boot normally.

Perform a System Restore

Performing a System Restore can help resolve the Windows stop code 0xC000021A error. Follow these steps to perform a System Restore:

1. Press the Windows key and type “System Restore” in the search bar.
2. Select “Create a restore point” from the search results.
3. In the System Properties window, click on the “System Restore” button.
4. Click “Next” in the System Restore window.
5. Choose a restore point that was created before the error occurred.
6. Click “Next” and then “Finish” to start the restoration process.
7. Wait for the system to restore to the selected point.
8. Once the restoration is complete, your computer will restart.

Performing a System Restore can help revert any recent changes that may have caused the 0xC000021A error.

Reinstall Windows 10

To reinstall Windows 10 and resolve the stop code error 0xC000021A, follow these steps:

1. Create a Windows 10 installation media. Use a USB or DVD to create a bootable installation media.

2. Boot from the installation media. Restart your PC and press the necessary key to enter the boot menu. Choose the installation media to boot from.

3. Choose your language and region settings. Follow the prompts to select your preferred language and region settings.

4. Click “Install now.” Accept the license terms and click “Install now” to proceed.

5. Select “Custom: Install Windows only.” Choose the installation drive and click “Next” to start the installation.

6. Follow the on-screen instructions. Windows will guide you through the installation process. Make sure to select the same version of Windows 10 that was previously installed.

7. Complete the installation. Once the installation is complete, follow the prompts to set up your PC and customize your settings.

By reinstalling Windows 10, you can fix the stop code error 0xC000021A and restore your PC’s functionality.

How to Recover Data After the Stop Code 0xC000021A Error

Here are some solutions to recover data after encountering the Stop Code 0xC000021A error on your Windows device:

1. Boot into Safe Mode: Restart your computer and continuously press the F8 key to access the Advanced Boot Options menu. Select “Safe Mode” and log in to your account.

2. Use System Restore: In Safe Mode, go to the Start menu, type “System Restore,” and open the corresponding tool. Choose a restore point before the error occurred and follow the prompts to restore your system.

3. Check for faulty hardware: Disconnect any external devices and check if the error persists. If it doesn’t, reconnect each device individually to identify the culprit.

4. Update or reinstall drivers: Access the Device Manager by right-clicking the Start button, and update or reinstall drivers that may be causing the error.

5. Run a disk check: Open Command Prompt as an administrator and type “chkdsk /f C:” to scan and fix any file system errors on your hard drive.

Remember to back up your important data regularly to prevent data loss in the future.

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