How to Solve Error Code 0xc000021a Windows 10/8/7

Error 0xc000021a in windows 10 or any previous Windows operating system is also called as stop error or blue screen error. There are several scenarios your computer may get this error 0xc000021a.

Scenario -1: When your computer running any old version of Windows operating systems like Windows 8 or Windows 7 and you are trying to upgrade to window 10.

Next Scenario -2: When you update any software package from pending updates.

Scenario -3: This is a rare case where you see this blue screen stop error oxc000021a in regular use.

More about  Error 0xc000021a in Windows 10/8/7:

Stop Errors are also called sometimes Blue screen (or) Black screen of Errors. These stop Errors are applicable to all versions of Windows like 10/8/7. These Errors can be caused by both the software and hardware Issues and it can be difficult to troubleshoot the problem. The blue screen of death appears when Microsoft Windows Encounters a critical Error 0xc000021a from which it can’t recover, Usually the low level of software crashes and faulty hardware. To fix the Stop Error 0xc000021a in Windows, you will diagnose the problem by testing common culprits like RAM, Hard drive, and temperature. Depending on the problem you may need to run a virus scan, clean up the hard disk, perform a repair installation, etc.

How to Fix the Windows Stop Error 0xc000021a:

Boot in a Safe Mode:

If Windows Wouldn’t start because of Blue Screen errors. In safe mode, Windows will only load the essential drivers. So if a driver recently installed is causing the Blue Screen of Error. Booting into safe mode is trying to fix the problem. As the computer is booting, Repeatedly press the F8 Key then the Windows boot menu appears. This process is in a detailed way

  • Hold to shift and press F8 button upon startup to recovery mode
  • Then open the Window Select the Advanced repair option, Press Troubleshoot and select Advanced Options.
  • Click Windows Startup settings and press restart
Boot in safe mode

Boot in safe mode

Select a safe mode With a networking to boot into a stripped down version of Windows. This is a allow to access your Device Manager, The Internet, and Other System Tools.

Scan for Malware:

Sometimes Viruses and malware are the root cause of Blue screen problem. These are will dig into your system registry and cause Instability. The buggy software very harmful and cause your computer to crash. If it can solve you have to install the latest anti-virus software and full fill the system scan to find anything that could be causing the problem.

Anti virus


Repair to Installation Windows:

This is an alternative way to complete the reinstalling Windows, as it only copies the system files to computer. This is useful if an essential file has become corrupt and is causing your computer to fail.

Repair Windows

To perform a repair installation, Insert your Windows Disc and Boot menu from it.In the setup menu select a Repair installation. Windows will delete old ones and copy new ones. So you will not lose any personal data.

Roll Back your Drivers

A driver is a software that allows your computer to communicate with hardware.An incorrectly installed driver is often the cause of blue screen errors.Download the latest drivers for your computer’s hardware from the official manufacturer’s websites and install them.

  • Open the Device Manager and select My Computer after that press on properties.
  • Select the hardware that you want to expand the rollback. you may have to expand categories to find it.
  • After that right-click on the icon and select properties. Then click the driver tab and select Rollback driver and confirm that you want to roll it back.
  • Once your drivers have been rolled back. Then your computer to verify the error doesn’t occur again. Don’t update the Driver again because new versions are released.

Roll Back Windows Update:

If rolling back the driver did not fix the problem. Consider restoring to an older, working installation of Windows.this will let you determine if the Windows update is responsible for the blue screen.

Windows update
  • Open a system restore. you can find system restore in the search bar into the start menu.
  • Open the program, and select a date from the calendar before you started experiencing Errors.
  • This will reset all of the updates and be setting to that date, Effectively removing the updates added afterward.
  • Uuse this to determine if a specific Windows update is caused your malfunction.

Clear Disk Cleanup:

If Windows Doesn’t have enough space on the Disk it is installed on, it can cause system failures.Remove unnecessary files and programs.If you have less than 15% of your hard Disk free.

Disk cleanup

Apply New Updates and Drivers:

If Rolling Back Drivers and Updates didn’t fix the problem then installing the latest versions and Updates may fix your problem. Check your Windows Update program to see if there are any new system and  Hardware Updates available.

Open the control panel through the start menu and search for Windows Update. Then it will be opened.

Windows Update

Reinstall Windows:

If you have tried all the above options without success. You may have to reinstall Windows. This will completely remove all of your system software and replace it with a new fresh system. Make sure that all of your Important Files backup before doing the re-installation. As your hard drive will be formatted for the installation process.


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Replace Damaged hardware:

If your Driver and update don’t solve your problem. You may need to remove and replace your Hardware. Replacing anything other than RAM and Hard drive can be difficult and expensive.

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