This pops up if one or more critical system files are corrupted.
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What Causes Error with Stop Code 0xC000021A?
0xC000021A blue screen error occurs for multiple reasons.
Let us now discuss the various techniques it’s possible for you to adapt to address the issue.
and verify this issue is not related to any external rig.
Here is how:
Hold down the power button for about 10 seconds to switch the machine off forcefully.
Once off, turn it back on again, and then repeat the process 3 times.
On the 4th bootup, Windows will boot into WindowsRE.
From there, navigate to the following:
The gadget will now restart again.
Press the one that says Disable drive signature enforcement.
Windows will now automatically restart and attempt to boot normally.
peek if you still experience bsod error 0xc000021a.
If you do, there are other solutions to fix this problem.
However, if you dont, there is an unsigned driver on your machine.
To ensure it is completely harmless, we suggest you run a deep malware scan.
Hence, many of the solutions would need to be performed afterbooting into safe mode.
Once off, turn it back on again.
Repeat the process 3 times and Windows will automatically boot into Windows Recovery (WinRe).
From there, navigate to the following:
The rig will now restart again.
Press the one that says Enable Safe Mode with Networking.
Launch anelevated Command Prompt.
Now execute the following commands one after the other.
Note that each of these can take a few moments to complete.
Repair BCD files
BCD files are important for the system to run and boot up smoothly.
These files may have been damaged causing a blue screen error 0xc000021a.
you could repair these by following the guide given below.
Start bymaking a bootable USB driveand boot from it using the boot menu at startup.
Now pop in inexitto leave the Command Prompt and then reboot the computer.
Now check to see if you’ve got the option to now boot Windows into normal mode.
If these repair attempts havent worked for you yet, let us try running a startup repair from WinPE.
From there, clickRepair your setup.
yo complete the scan while ensuring that it doesnt lose power and follow any on-screen instructions.
Once the scan is complete, Windows will attempt to boot normally again.
Once it reboots, check to see if the issue has been resolved.
In that case, you must either update the driver or reinstall the current driver.
The wizard will now search for new drivers using Windows Update.
After the scan is complete,closethe wizard.
It is also possible that it states The best drivers for your machine are already installed.
In this case, you’ve got the option to attempt toinstall the driver manually.
If the driver cannot be updated, we suggest that you uninstall the gear and thenreinstall the driver.
You will then be asked if you want to remove the driver as well.
This can occasionally cause an improper system boot resulting in a Windows error.
Therefore, we suggest that you disable Fastboot, which means changing its tweaks from Minimal to Thorough.
Enter the system BIOS.
Now look for the Power-on self-test (POST) configs, and then dive into the Fastboot menu.
Here, change the tweaks to Thorough and then exit the BIOS while saving the changes.
Now check to see if the issue has been resolved.
If it fails to repair any discovered bad sectors, it informs the operating system not to use them.
EnterYfor yes.Check the disk next time the computer restarts
Now cycle your gear.
Once it reboots, the Check Disk utility will run and scan your hard drive.
This can take a while, in some cases, hours.
Let the scan finish and reboot into Windows.
Once it reboots, test whether the error is gone.
If so, you must run a deep malware scan of your PC and remove/quarantine any anomalies.
Use the built-in Windows Security Antivirus (formerly Windows Defender) to scan your box for malware.
Here is a list of thetop antivirus software to useto perform the scan.
If you are proceeding to purchase antivirus software, here are the17 aspects you should always consider.
This can be enabled by usingBackup & Restore.
Now pick the operating system to restore.Select OS
You will now see theSystem Restorewizard.
ClickNext.Proceed with System Restore
Now snag the restore point by clicking on it, and then clickNext.
Now clickFinish.Finish restore
You will now be asked for confirmation.
ClickYes.Confirm restore
Windows will now restore to a previous restore point.
When finished, clickRestart.Restart computer
This should take your PC back to when the restore point was created.
If the 0xC000021A BSoD issue did not exist back then, then it should be resolved.
Reset Windows
Resetting the computer brings all configurations back to their factory default prefs and values.
If the solutions discussed above did not work for you, then you must now reset your PC.
Here is how:
Boot into WindowsRE using bootable media and clickTroubleshoot.
We suggest that you click KeepMy Files.Keep files
You will now be asked to reinstall Windows.
Finally, clickResetto begin the process.Confirm reset
Windows will now begin to reset itself.
This step can take a while.
Final Verdict
The solutions provided above should fix error code 0xC000021A.
These solutions are alsorecommended by Microsoft Experts.
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source: www.itechtics.com
