Have you ever got a Windows system error when using the computer? In my opinion, it is very common for computer users to get kinds of computer errors during their computer life. Such errors will make the computer to perform sluggishly or even encounter computer crash at any time. A very common error, which computer users can face when turning on the computer, is the “STOP: c000021a {Fatal System Error}” error as you can see the error message below:
“STOP: c000021a {Fatal System Error}
The Windows Logon Process system process terminated unexpectedly with a status of 0xc0000034 (0×00000000 0×0000000)
The system has been shutdown.”
Most of the time, the STOP 0xC000021A error occurs when either Winlogon.exe or Csrss.exe fails to perform properly. When the Windows NT kernel finds that either of these processes has stopped, it will immediately stop the system and cause the STOP 0xC000021A error. Besides, this error message can also be caused due to the aspects below:
* Mismatched system files have been installed incorrectly.
* A Service Pack has failed to be installed completely.
* A backup program which is used to restore a hard disk did not correctly restore files that may have been in use.
* An incompatible third-party program has been installed on the computer.
After learning the causes, below are the common solutions that you can use to troubleshoot and fix the “STOP: c000021a {Fatal System Error} error on your computer immediately.
To fix the STOP 0xC000021A error, you can try to start your computer by using the Last Known Good Configuration feature. To do this, restart your computer and hold your “F8 Key” which should bring up the “Windows Advanced Options Menu”, then use the ARROW keys to select Last Known Good Configuration (your most recent settings that worked), and then press ENTER. This will bring your computer into the most recent settings that will perform the computer properly.
Secondly, please note that Windows updates are necessary to enhance computer performance and improve PC security. However, if one cannot be installed properly, this will be the cause for so many computer problems. So it is recommended that you can troubleshoot the Windows updates and reinstalled the improper ones. You can open the Windows Update troubleshooter by clicking the Start button, and then clicking Control Panel; Type troubleshooter in the search box, and then click Troubleshooting; and then you can click Fix problems with Windows Update under System and Security to solve all other problems.
Thirdly, remove the incompatible third-party software with the Recovery Console. If all the above steps do not help, you need to check what you have installed recently and easily remove them from the computer by using the Recovery Console. However, you can uninstall them by using the Windows built-in Add/Remove Programs feature. By the way, it is recommended that you should thoroughly scan your computer with a registry cleaning utility to get rid of leftover entries within Windows registry. Windows registry is the main component of Windows operating system to store all setting & options of the hardware & software on the computer. If this database is filled with lots of invalid or corrupted entries, it will be impossible for the system to access the needed entries to load the computer and some certain programs, resulting in the “STOP: c000021a {Fatal System Error} error.
By the way, a registry repair tool also helps to detect and repair other computer errors just like the Winlogon.exe or Csrss.exe error stated previously to prevent the coming of STOP 0xC000021A error and make sure that the computer can always run properly without problems. If you are facing with this frustrated system error right now, simply run a free registry error scan right now.
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You are right as this is usually caused by a missing or corrupt winlogon.exe file. Boot from a Windows XP install disc or recovery disc and when it prompts you to install, upgrade or recover, select R for a recovery console. This will get you a command prompt and you can look in c:\windows\system32 to see if you are missing the winlogon.exe file. If you do not have the file, run the expand command to get it back. If your CD drive is d:, run: “expand d:\i386\winlogon.ex_ c:\windows\system32\winlogon.exe” to restore the file. Then remove the install disc and reboot the PC.
My PC hasnt been touched in a few years, Dell Inspiron 3000 Pent. 4, I just booted it up and ran the windows updates. It restarted (normal) and then goes through everything then all the sudden a blue screen pops up with the stop c000021a error. Your really provide me detailed information to solve the problem.
It is obviously that you are right in this point to solve this computer errors.
STOP: c000021a {Fatal System Error}
The Windows Logon Process system process terminated unexpectedly with a status of 0xc0000034 (0×00000000 0×0000000)
The system has been shutdown.
If you’ve recently installed a program, it might be incompatible with Windows XP and cause this problem. The problem occurred on my computer because of this reason.
My Sony Vaio laptop has crashed with a c000021a fatal error, it will not boot at all. When I turn it on it it flashes up either an operation failed message or does some sort or restart loop until the screen turns blue listing the error. I can’t even start it in safe mode as the keyboard is frozen and not working. Thanks for providing me this information to solve it!
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