Fatal Error c000021a is a type of Windows stop error also known as the blue screen of death (BSoD) error. When this error occurs, it causes the computer screen to go blue and locks the user out of the current activity.
This error code is fatal and can lead to serious issues like system crashes and freeze.
The error code is usually displayed in the following format:
STOP: c000021a {Fatal System Error}
The Windows Logon Process system process terminated unexpectedly with a status of 0xc0000034 (0x00000000 0x0000000)
Error CausesFatal Error c000021a occurs when the Windows kernel detects that either Winlogon.exe or Csrss.exe service processes have stopped responding or failed to load. When this happens the error code pops up on the screen.
Nonetheless, this is not the only reason for the occurrence of this error. There are plenty more reasons why Fatal Error c000021a may pop on your computer screen. These include:
No matter what the reason may be, it is advisable to fix the error right away without any delays. Remember it is a fatal error and can cause a great deal of damage to your PC.
Fatal Error c000021a is a serious PC issue but this does not mean you have to hire an expert to get it fixed. The good news is that this error is actually quite easy to resolve.
You don’t have to be a technical whiz or a computer programmer to fix Fatal Error c000021a on your PC.
Here are some do it yourself methods to fix this error code right away without any hassle:
Let’s get started:
As we mentioned about corrupt or missing drivers can be one of the many reasons for the occurrence of this error. So, check the drivers first. Perform a driver scan and make sure all your drivers are updated.
To do this, first launch Task Manager by pressing CTRL+SHIFT+ESC on your keyboard. Now click on the application tab and then click ‘New Task’ then browse.
After that, go to C:\Windows\System32\Restore folder and then double click the rstrui.exe file. This will help start system restoration. Your computer will reboot during the process and hopefully, the error will be resolved.
Nonetheless, if the error still persists then try methods 3 and 4.
Sometimes Fatal Error c000021a may also occur due to malware infection. Your PC may be affected by viruses hidden in different locations without you knowing about it.
Therefore to resolve this error, it is recommended to run an antivirus and scan for viruses. If detected, remove them right away to fix the error code.
Another method to resolve Fatal Error c000021a code on your system is to repair the registry. The registry stores all the information and activities performed on the system.
If it is not cleaned frequently, it gets loaded with too many files unnecessary and obsolete files like the junk files, cookies, internet history and temporary files which corrupts and damages the registry thereby generating blue screen of death error codes like Fatal Error c000021a.
Though you can repair the registry manually it can be both time-consuming and slightly difficult especially if you are not a computer programmer. Therefore it is advisable to download a registry cleaner to fix it right away.
Whether the Fatal Error c000021a code occurs due to viral infection or registry issues, download Restoro. This is a next-generation, advanced, and multi-functional PC Fixer. This software is deployed with multiple utilities such as a powerful registry cleaner, an antivirus, a system optimizer, and more.
The registry cleaner scans the entire PC and detects all types of registry issues at once. It cleans the registry, wipes out all the unnecessary files, and restores the registry back to normal.
Simultaneously, the antivirus embedded in this software detects all types of viruses including malware, adware, spyware and Trojans and removes them in seconds.
The system optimizer feature ensures the speed and performance of your PC are not compromised during the repairing process. It ensures your PC works at its optimal speed.
Restoro is a one-stop solution for all your PC needs. It has a user-friendly interface making it easy for all levels of users to work around. It is compatible with all Windows versions
Click here to download Restoro and resolve the Fatal Error c000021a code on your PC today!

Restart graphic driverError code 0xc004f210 is one of the many activation errors that affect Windows 10 users. Users will be able to identify error code 0xc004f210 because of the following common symptoms which occur:
Error CausesError code 0xc004f210 usually occurs due to issues related to one’s product key or digital entitlement. Both the product key and digital entitlement are used by Microsoft to enable customers to activate the version of Microsoft that they have legitimate access to. If you enter the wrong product key or if you upgrade to Windows 10 but the current version of Windows to which you are attempting an activation does not match the edition of your digital entitlement, error code 0xc004f210 may occur. To correct this issue, you will need to implement one or more manual repair procedures. This will depend on the problem that caused the error to occur in the first place.
The methods below are simple procedures that Windows users lacking technical knowledge will be able to successfully complete. However, do contact a Windows repair technician if you have difficulty completing the manual repair methods listed below, or if the problem persists after completing these steps.
In order to successfully activate your Windows 10 operating system and resolve error code 0xc004f210, you will need to enter a valid product key. Ensure you enter the 25-character code in the order it is given as making a simple mistake while typing the product key can lead to the reoccurrence of the error code. Follow the instructions below to enter the product key.
You should be able to successfully activate Windows 10 once you complete the process. However, move to the next manual method suggested below if the problem persists as error code 0xc004f210 could be due to an issue with your digital entitlement.
Digital entitlement, a new form of activation that doesn’t require the use of a product key, could be the real reason you are experiencing error code 0xc004f210 on your device. To combat any issues related to your digital entitlement, ensure the version of Windows 10 installed on your system matches your digital entitlement. This will require that you reinstall your operating system as well. After reinstalling Windows 10, follow the steps below to complete the process.
If this method is successful, you will no longer see the error code 0xc004f210 pop up on your screen. However, contact a Windows repair technician to evaluate your system if the issue persists.
This method involves the use of a powerful automated tool. But why is this important you might ask? A third-party tool is often the best solution when all manual repair efforts fail. Automated tools come equipped to tackle the most serious PC problems including error codes which can cause frustration and result in reduces PC performance.
“Check your connection, Microsoft Store needs to be online, It looks like you are not, error code 0x80072f30.”The error code 0x80072F30 is related to the Windows Store which prevents it from opening properly. To resolve this problem, you can try fixing the problem with the help of the options given below. Follow each one of them carefully.
0x80004005 Outlook is an error that users commonly encounter while attempting to send or receive emails on Outlook.
The message that appears usually states “This message could not be sent. Try sending the message again or contact your network administrator."
The client operation failed. Error is [OX80004005- 0X0004B9-OXOO501].
This error is usually caused by a problem in the Local Area Network or LAN. What actually happens is that signals with the wireless LAN are lost or a connection problem occurs within the network cable.
As a result, the 0x80004005 Outlook error is triggered while sending or receiving an email. Sometimes the problem goes away on its own. However, if it recurs after a few hours, it shows that some problem exists within the network.
Also, it is important to understand that different factors can affect the quality of wireless connections in a network.
For instance, garage door openers, microwave ovens, and Bluetooth devices can easily become obstacles, disrupting the connection and causing the quality to degrade. Other causes are listed below as follows.
It is a must to fix this error otherwise potential risks associate with this error such as permanent damage and blue screens.
There are two ways to fix this error and both are listed below as follows.
Both these workarounds will work. Therefore, it is advised that you employ any one of them as per your needs.
Error 1309. Error reading from file: pathfilename.cab. Verify that the file exists and that you can access it.When installing Microsoft Office 2003, the error message may appear in the following format: Fatal Error During Installation
Error Causes