subject: How to Fix "Stop C000021a Fatal System Error" Safely [print this page] Computer errors like "stop c000021a fatal system error" are really annoying. It is really testing when you are in the middle of some work. Once you come across such errors, you should never delay in correcting them as delays could only lead to further problems.
C000021a fatal error can be caused because of many reasons. The error can be because of mismatched system files, malware infections, improper installation of service pack and registry issues.
The error can happen if there is any problem with the installed software. You should have to identify the problematic software and delete it. After this, you can reinstall the software. But when reinstalling the software, make sure that you have the updated version so that it does not clash with your system.
When running the computer, there are chances that "stop c000021a fatal system error" may pop up because of the operating system. In order to come out of this problem, just upgrade the operating system.
This error can also happen because of virus attacks. Viruses like Trojan horse and malware can loop into the files and corrupt them, which leads to the error. You should have effective anti-virus software in the system to prevent it from freezing.
Another way to solve this fatal system error is to reboot the computer. After restarting, you have to press F8 and choose the last best-known configuration. Once you do this, the error might have been removed.
You can see "stop c000021a fatal system error" if your registry is having problems. The registry is an important area in the system that stores all valuable data. The registry can become over loaded because of the adding of files every time you run some program. Moreover, the program files can also get corrupt. All these may lead to a faulty registry. If errors pop up, you should have to clan the registry. In case you know how to clean the registry, then you can do it manually. If not, do not take any risks. Another easy way to clean the registry is using registry cleaning tools. This tool automatically cleans the entire registry and the good part is that all your valuable files are not touched upon.
How to Fix "Stop C000021a Fatal System Error" Safely
