How to Fix Error Code 0x00000021 on Windows 10?

The Blue Screen of Death or Blue Screen is a stop error which might occur after a fatal system crash. The Windows operating system itself shuts down to stop damages which would be caused. Typically, it consists of descriptions of the problem, including the error code name.

The Error code 0x00000021 is a blue screen error, usually encounters by the users after the installation of any new software or hardware. It may occur during the time of startup r shut down of any programs, or at times, during the time user running any application. Some users are also reporting that this error slows down the computer system, and reduces the response time of the mouse and keyboard. At times, this error 0x00000021 also shows a message that says, Quota_UNDERFLOW error.

Causes of Error Code 0x00000021

This error 0x00000021 on Windows 10 can be occurring due to various reasons; some of them are discussed below:

  1. Incorrect, corrupted or Outdated browsers.
  2. Damaged RAM.
  3. Malware Infections.
  4. Driver conflict after installing any new hardware on the system.
  5. Hard Disk Malfunction.
  6. Corrupt or Outdated registry entries.
  7. And many more.

Before you continue with the 0x00000021 error, we advise you to perform a full system scan to clear out all the problems immediately. These regular BSOD errors, slowdowns of the computer system, or software crashes might indicate that your computer might be infected with viruses and malware. However, Cyber threats are capable of installing and downloading more viruses and malware on your computer, easily steal all your confidential data, locked up your confidential files, and also damages the performance of your computer system.

Steps to Fix Error Code 0x00000021 on Windows 10

There are many solutions to this error code 0x00000021, but below we provide you with a few simple methods which can help you in fixing this error code. If you follow the below-given method in ascending order, then it will prevent you from errors and damages. Here how to fix it:

Method-1: Always Keep your Windows Up-to-date

The most important steps to fix this error 0x00000021 are to ensure that your operating system is always updated. Though, Microsoft often releases some patches that not only fix vulnerabilities. Instead, it will also help in improving performance and compatibility issues with the hardware and software. Some users have reported that by updating the operating system to the latest version fixed the problem.

  1. Firstly, Under the Task Bar search box, type “Update.”
  2. Hit the “Check on Updates” option.
  3. If any new updates are available, then click on it.
  4. After successful installation of Updates, restart your computer.

Method-2: Update your Drivers

Sometimes, corrupt or outdated drivers might encounter an error 0x00000021, so before following the steps; just ensure that you have installed the latest driver on your computer system. Either you can download it manually by using Device Manager or by simply installing any software that can install the latest drivers automatically without creating any problem. Here how to fix error with this method:

  1. Right-click on the “Start” icon.
  2. Then, select “Device Manager” option.
  3. Next, right-click on the “Device Manager,” and choose “Update Driver” option.
  4. Now, hit “Search automatically for updated driver software” option and allow the Windows to install the latest driver version.
  5. Finally, make sure to restart your computer system.

Once check that aforementioned steps work or not. Hopefully, it will help you in fixing this error code 0x00000021.

Steve Rogers is a Microsoft Office expert and has been working in the technical industry since 2002. As a technical expert, Steve Rogers has written technical blogs, manuals, white papers, and reviews for many websites such as office.com/setup.

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