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Step-by-Step Guide to Fixing BSOD Error Code 0xc000021a in Windows 10 and 11

2024/10/11
PC Repair

Key Notes

  • Common causes of BSOD error code 0xc000021a include system file corruption and faulty hardware.
  • Try booting into Safe Mode with Networking to troubleshoot the issue.
  • Utilizing tools like SFC and DISM can help repair corrupted files and restore system functionality.

Resolving the BSOD Error Code 0xc000021a in Windows 10

Experiencing the dreaded Blue Screen of Death (BSOD) with error code 0xc000021a can be a frustrating experience for any Windows 10 user. This particular error often stems from incompatible software, pending Windows updates, or hard drive issues. This guide covers actionable solutions, ensuring you can return to a stable system promptly.

Solutions for Fixing Error Code 0xc000021a

Step 1: Disconnect and Reconnect Peripheral Devices

Incompatible devices can sometimes trigger the BSOD. Follow these steps:

For Desktop Users

  • Power off your computer. If you can’t, press and hold the Power button until it shuts down.
  • Unplug all power connectors from your machine.
  • Detach all peripheral devices and clean their ports.
  • Open your computer casing, disconnect HDD cables, clean them, and reconnect securely.
  • Reattach peripherals, then restart your system.
  • After booting, reconnect devices one at a time to identify any causing the issue.

For Laptop Users

While it’s generally not advisable to open laptops, if you choose to do so, disconnect the power supply and remove the CMOS battery briefly before reinserting it. Alternatively, just follow the disconnect steps for peripherals.

Step 2: Boot with Advanced Options

If the BSOD prevents you from logging in, you can boot into Safe Mode:

  • Restart your PC 2-3 times to trigger Automatic Repair.
  • If the Automatic Repair screen doesn’t show, use bootable media with Windows 10 and restart while holding down the boot menu key.
  • In BIOS, select “Repair this PC.”
  • Choose Automatic Repair followed by Advanced Options.
  • Select Troubleshoot.
  • Navigate to Advanced Options > Startup Settings and press F5 to enter Safe Mode with Networking.

Step 3: Repair Corrupted System Files Using SFC

Corrupted Windows files can trigger the error. Use SFC to fix this:

  • Search for Command Prompt in the Start menu.
  • Right-click and select Run as administrator.
  • In the UAC dialog, click YES.
  • Type sfc /scannow and press Enter.
  • Once done, reboot your computer.

Step 4: Fix HDD Corruption

Check for hard drive issues that could cause the BSOD:

  • While in Safe Mode, open Command Prompt as an administrator.
  • Run dism /image:c:\ /cleanup-image /revertpendingactions.
  • Allow the process to finish, then restart your PC.

Step 5: Restore Corrupted Files Using Registry Backup

If registry hives are damaged, replace them using backups:

  • Insert Windows Installation Media and restart your computer.
  • When prompted, enter the BIOS settings.
  • Select language settings, then choose Next.
  • Choose Repair your computer.
  • Go to Troubleshoot > Advanced options > Command Prompt.
  • Change to C:\Windows\System32\Config and rename the damaged files:
  • ren SYSTEM SYSTEM.old and ren SECURITY SECURITY.old.
  • Run the following commands to replace from RegBack:
  • Type exit to leave WinRE and reboot.

Step 6: Assess Hard Drive Health

Check for bad sectors affecting system performance:

  • Press Win + E to open File Explorer.
  • Right-click the root drive, select Properties.
  • Click on the Tools tab and hit the Check button.

If necessary, run the chkdsk C: /f /r /x command in the admin console to check the disk for issues.

Step 7: Utilize a System Restore Point

If the BSOD appeared after a Windows update, restoring to a previous point might help:

  • Open the Start menu, type System Restore.
  • Select Create a restore point.
  • Click on System Restore in the system properties tab.
  • Follow the wizard to choose a restore point and initiate the restoration.

Step 8: Clean Install Windows 10

When all else fails, consider a fresh installation:

  • Download the Media Creation Tool from the official Microsoft website.
  • Run the setup and follow instructions to create installation media.
  • Select whether to create bootable media or an ISO file and complete the installation.

Summary

Addressing the BSOD Error Code 0xc000021a involves a series of steps from disconnecting peripherals to performing system checks and restoring configurations. Each method can help pinpoint and resolve the underlying issue to restore system functionality effectively.

Conclusion

Dealing with error code 0xc000021a can be challenging, but the strategies outlined can help restore your Windows 10 system. It’s vital to regularly check for system updates and ensure your hardware is functioning correctly to prevent future occurrences.

FAQ (Frequently Asked Questions)

What is the BSOD Error Code 0xc000021a?

The BSOD error code 0xc000021a often indicates a critical Windows system process has failed, typically due to file corruption, incompatible software, or hardware issues.

How can I prevent BSOD errors in the future?

Regularly update your Windows OS and drivers, check hardware performance, and maintain system backups to prevent BSOD errors.

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