How to Fix the Error Code 0xc000021a on Windows 8 and 10

What is Error Code 0xc000021a?

The error code 0xc000021a is a BSOD problem that might come forth in Windows 8 and 10.

It comes forth in cases if the system feels that something goes wrong with the security, or when any of the critical system files are not identical to what they should be, thus forcing Windows to stop working and thus allowing no further damage.

It could be immense corruption inside of system files, disturbed updates, issues about BIOS, or problems relating to the disk drive. Your system also needs some steps in order to work.

Read about our Popular Drivers that will improve your system’s performance:

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How to Fix 0xc000021a on Windows 8 and 10

Boot Windows Manually

In some cases, manual rebooting solves the reason for the occurrence of the 0xc000021a error.

  • Turn your computer on, then press and hold the Shift key while clicking Restart under Power options.
  • Once the Advanced Startup menu shows, tap on Troubleshoot, then click on Advanced Options and lastly on Startup Settings.
  • Click Restart, then from the options, select Safe Mode.
  • Try to troubleshoot in Safe Mode any potential software conflicts or issues with system files.
  • Reboot your system to check if this fixes the problem.

Perform a Full SFC Scan

SFC utility allows the system to check for any corrupted system files that may be causing an error and then repair those files.

  • Press Win + R to open the Run dialog box.
  • Type cmd and press Ctrl + Shift + Enter to open the Command Prompt as an Administrator.
  • Enter the command sfc /scannow in Command Prompt and press Enter.
  • Wait until the scanning process is complete, then follow any onscreen instructions.
  • Once the SFC scan has finished, restart your PC and check whether the error persists.

Reset Your PC’s BIOS

Sometimes, system BIOS settings collide with system functionality and bring about the 0xc000021a error. Then, a BIOS reset might resolve the issue.

  1. Restart your computer, then, while booting, press the key for BIOS: usually F2, F12, Del, or Esc; it entirely depends on your manufacturer.
  2. Scroll down to Setup Defaults or Reset to Default option.
  3. Save the changes and then exit the BIOS setup.
  4. Your system will restart with all default BIOS settings. Check whether the problem is solved or not.

Repair Your PC’s Disk Drive

Error code 0xc000021a might also be brought about by an error in the Disk Drive or corrupted sectors. This is fixable using the CHKDSK utility.

Press Windows + R to open the Run dialog. In the input field, write cmd and press Ctrl + Shift + Enter to open Command Prompt as administrator.

Command Prompt: In the command prompt, type in chkdsk /r and press Enter. When prompted, type Y to schedule the scan for the next restart.

Restart your computer and allow CHKDSK to run. It would scan the disk for errors and repair them. Permit the system to boot completely, and see whether the error disappears.

You can also consider using Outbyte PC Repair tool, which helps identify and fix a wide range of performance-related issues automatically.

Check out other Outbyte products for additional support:

Outbyte Driver Updater for keeping drivers current.

Outbyte AVarmor for system protection.


FAQs

What is the 0xc000021a error triggered by?

This error is caused by corrupted system files, failed updates, problems with the disk drive, or software incompatibility.

Will I need to reinstall Windows if I get the error 0xc000021a?

Most cases don’t need such an extreme move and can be fixed with an SFC scan, BIOS settings reset, or disk drive repair via CHKDSK.

How does Safe Mode help you get rid of this problem?

The Safe Mode is a method to boot Windows with minimal drivers and services. You can identify software conflicts more easily from there and remove faulty updates.

Would there be any tool for system performance optimization after fixing this error?

Yes, using any tool like Outbyte PC Repair will show better stability of the system and prevention from further errors.

Can outdated drivers cause error code 0xc000021a?

While outdated drivers may not be the root cause of this error, updating them can also rule out any potential problems.

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About The Author
Position: Author

Yuri Thomopsov is a technology enthusiast and writer with a focus on simplifying complex tech issues for everyday users. He specializes in resolving Windows and software-related problems, offering clear, actionable solutions. Yuri is passionate about empowering readers to optimize their devices and enhance productivity in their digital lives.

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