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How to Fix Fatal Error c000021a

Fatal Error c000021a - What is it?

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)

Solution

Restoro box imageError Causes

Fatal 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:

  • Missing or corrupt hardware drivers
  • Faulty hardware
  • Windows System Restore failed during the rollback process
  • Malware or viral infection
  • Registry issues

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.

Further Information and Manual Repair

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:

Method 1: Update Your PC Drivers

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.

Method 2: Perform a Windows System Restore

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.

Method 3: Scan for Viruses

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.

Method 4: Repair the Registry

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.

Automatic Repair with Restoro.

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!

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Technical Details and Manual Removal (Advanced Users)

If you’d like to carry out the removal of DailyProductivityTools manually instead of using an automated tool, you may follow these simple steps: Navigate to the Windows Control Panel, click the “Add/Remove Programs” and there, choose the offending program to uninstall. In case of suspicious versions of web browser plug-ins, you can actually get rid of it through your web browser’s extension manager. You will likely also want to reset your internet browser. If you opt to manually delete the system files and Windows registry entries, utilize the following checklist to make sure you know exactly what files to remove before carrying out any actions. But bear in mind, this can be a difficult task and only computer experts can perform it safely. Furthermore, certain malicious programs have the capability to defend against its removal. It is advisable that you carry out the removal procedure in Safe Mode.
Files: %UserProfile%\Local Settings\Application Data\DailyProductivityToolsTooltab %LOCALAPPDATA%\DailyProductivityToolsTooltab %UserProfile%\Local Settings\Application Data\Google\Chrome\User Data\Default\Sync Extension Settings\difcnlhbpohkmlhkpkimihocbagbijii %LOCALAPPDATA%\Google\Chrome\User Data\Default\Sync Extension Settings\difcnlhbpohkmlhkpkimihocbagbijii %UserProfile%\Local Settings\Application Data\Google\Chrome\User Data\Default\Local Extension Settings\difcnlhbpohkmlhkpkimihocbagbijii %LOCALAPPDATA%\Google\Chrome\User Data\Default\Extensions\difcnlhbpohkmlhkpkimihocbagbijii Registry: HKEY_LOCAL_MACHINESoftware\Wow6432Node\DailyProductivityTools HKEY_LOCAL_MACHINESoftware\DailyProductivityTools HKEY_LOCAL_MACHINESoftware\Microsoft\Internet Explorer\DOMStorage\dailyproductivitytools.dl.myway.com HKEY_LOCAL_MACHINE\Software\[APPLICATION]\Microsoft\Windows\CurrentVersion\Uninstall..Uninstaller DailyProductivityToolsTooltab Uninstall Internet Explorer
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Option 1 – Take Ownership of the folder

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Option 2 – Try to add Authenticated Users or Domain Computers

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Option a – Try to clear disk space

You might have to check if your disk is running out of space because if it is, then it will fail to create a list abruptly. And so you need to free up some disk space. You can either check on the files manually especially if you tend to keep your files at random places in your disk drive.

Option b – Find the Target route

You need to find the target route of the folder and then restore it if you are getting the “Failed to build the list of regular subdirectories” when you try to relocate the folder to the original location.

Option c – Try to change Ownership/Reset Defaults for all the User folders

If the “Failed to build the list of regular subdirectories” error pops up when you are trying to move a large number of files from one location to another, then you need to change the ownership of the folders as pointed out earlier.
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Solution

Restoro box imageError Causes

The ultimate and the underlying cause of low memory error is data overload in the RAM which triggers registry issues. To understand this better, here is a comprehensive explanation. The computer has 2 types of memory, RAM (Random Access Memory) and virtual memory. All programs and activities that you do on your computer are saved by the registry in the RAM. This includes obsolete and unnecessary files too like junk files, cookies, internet history, temporary files, invalid registry entries, and bad registry keys. Due to poor PC maintenance practices, these files accumulate in the RAM, thereby overloading it. Also, all programs on the PC use RAM to run. So, when there isn’t enough RAM for the program you are trying to run on your system, Windows temporarily moves information that would normally be stored in RAM to a file called a paging file which is also referred to as the virtual memory. By moving the information to and from the paging file- the virtual memory, Windows temporarily frees up enough RAM for programs to run smoothly. However, when you start running more programs than the RAM installed on your PC can support, low memory errors begin to occur. It triggers that the computer is out of RAM and is also low on virtual memory.

Further Information and Manual Repair

PC users should know that this is a critical error therefore it is advisable to fix it immediately before the damage sets in. Here are some of the best solutions that you can try to resolve Your computer is low on memory and similar memory leak errors on your system.

1. Run Few Programs at a Time

This is a temporary solution to prevent low memory problems.  By running a few programs at one time you can easily keep this memory error away from popping on your computer screen. However, this can cause you inconvenience if you run several programs together to perform different tasks simultaneously.

2. Increase the Virtual Memory Size

Though Windows automatically attempts to augment the virtual memory size the first time you experience ‘low on memory issues; however this again is a temporary way out of this problem. But if you are looking for a solution that can resolve these memory issues for a long time, then you can try manually increasing your PC’s memory size. Increase it up to a maximum size this is by the way determined by the amount of RAM installed on your system. Nonetheless, the drawback of this solution is that increasing the paging file size can reduce your PC performance. It can make your programs run more slowly.

3. Install More RAM

Another solution to resolve low on memory issues is to install more RAM. To do this first check your system properties to see the size of the RAM already installed on your PC. To do this press the Windows key+ Pause/Break key this will open system properties. If the RAM size is lower than 2 GB then you need to install more RAM. But if it is more then you should look for two things one check the piece of software that is causing the problem and secondly you need to clean the registry and remove the unnecessary files from your RAM and hard disk. This would free up space dramatically and resolve the low memory issue right away.

4. Download and Run Restoro, Registry Cleaner on your System

To clean the registry and wipe out unnecessary and obsolete files overloading your RAM and disk space, you should download Restoro. Restoro is a next-generation and highly functional error cleaner. By running this error cleaner on your system, you can easily scan for junk stored in your RAM and hard disk and remove it in seconds, clearing up ample disk space. This will resolve all your PC memory-related issues. Furthermore, it repairs the damaged files and restores the registry too. It spares you from the hassle of installing more RAM or virtual memory. Since this PC repair tool also functions as a system optimizer, it simultaneously boosts the speed of your system thus resolving speed issues too, all in one go. Restoro is a bug-free and efficient tool. It has a user-friendly interface making it easy for all levels of users to operate and run it on their systems. Furthermore, it is compatible with all Windows versions including Windows 7, 8, XP,  Vista & 10. Click here to download Restoro to resolve Low on Memory issues on your PC in seconds!
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