Fatal system error c000021a – What is c000021a error and how to fix it?

The c000021a error is a fatal memory leak error which can come onto the computer due to several factors. No matter whenever you see the fatal system error c000021a on your screen, you must do something immediately to deal with it; otherwise, this will make memory leak at your windows operating system and affect the proper running of the computer. A lot of people will suggest you to reinstall windows when encountering this system error, but it is a lot of other things you can do before reinstalling the computer – both save your time & your energy.

Firstly, you should know that the c000021a error is always caused when there is something wrong with the computer drivers. So the first thing you should do to use the Windows built-in Troubleshoot program to detect the problems. You can do this by simply opening Device Manager in the Windows operating system, clicking on Properties and choose the General tab. After that, select the Troubleshoot and wait & follow the instructions presented to finish the processes.

Then, you can re-install any program that may be causing the fatal system error c000021a together with a blue screen as this process will replace any of the damaged files that are on your system that could be causing these problems and error:
*Click Start and go to Control Panel.
*Click on Programs and Features icon.
*Right click on the Flash Player.
*Click Uninstall.
*Restart your computer on completion of process.
*Download new copy of the program from the Internet.
*Install it.
*Again restart your PC.

Most of the time, the c000021a issues might be caused by adware or virus infections as they are able to attack and remove any core system file from the computer without your permission. Once the Windows cannot find the needed files in the computer or when a file is disguised by some PC threats, it will be very easy for you to get the c000021a errors when starting up the computer or launching a specific program. So it’s sensible to use a virus removing program to detect and remove any adware infections from the computer. By the way, it is better that you can make your antivirus program working in the background to realtime protect and remove any threats to the computer.

Finally, I highly recommend you to scan and fix Windows registry errors. Registry acts as the most important component of the computer and controls the proper running of the computer and all programs installed on the PC. When there are some errors existing in this database, the system will fail to read the needed files correctly and then display the fatal system error c000021a message. So, if the solutions above do not help to fix the error, do remember to pay several minutes to download and run a registry cleaning tool to see whether it helps or not. According to my own experience, this will sometimes be the most effective solutions to fix c000021a error on the computer.

To sum, you can fix c000021a error by performing the steps above one by one; however, according to my own experience, it is very easy to fix fatal system error c000021a with an advanced PC tweaker as it will thoroughly scan the whole computer & fix all errors causing the fatal system error message instantly.