All About Fix 0xC19001 0x40021 Error While Upgrading to Windows 11

All About Fix 0xC19001 0x40021 Error While Upgrading to Windows 11

Upgrading to the latest version of Windows has always been an exciting and highly anticipated event for PC users. However, with the recent release of Windows 11, some users have encountered a frustrating error code: 0xC19001 0x40021. This error can prevent the upgrade process and leave users searching for solutions. In this article, we will dive into all there is to know about the 0xC19001 0x40021 error and provide helpful tips on how to fix it, so you can successfully upgrade to Windows 11.

Fix: (0xC19001-0x40021) Error While Upgrading to Windows 11

Windows 11 has been the talk of the town ever since its announcement in June 2021. With its new user interface, improved features, and better performance, many Windows users are eagerly waiting to upgrade to this latest version. However, some users have reported encountering an error while upgrading to Windows 11, with the error code (0xC19001-0x40021). Let’s understand what this error means and how to fix it.

What is the (0xC19001-0x40021) Error?

The (0xC19001-0x40021) error occurs when the system fails to install Windows 11 due to compatibility issues. It is usually seen during the initial stages of the upgrade process when the system is checking for compatibility requirements. This error can happen due to several reasons, such as outdated drivers, incompatible hardware, insufficient disk space, or corrupted system files.

How to Fix the (0xC19001-0x40021) Error While Upgrading to Windows 11?

There are a few methods you can try to fix the (0xC19001-0x40021) error and successfully upgrade to Windows 11.

1. Check System Requirements

Windows 11 has certain system requirements that your system must meet to be able to upgrade. Some of the important requirements are a 64-bit processor, at least 4GB RAM, 64GB of free disk space, and a compatible graphics card. If your system does not meet these requirements, you may encounter the (0xC19001-0x40021) error. In this case, you can either upgrade your hardware or consider upgrading to a newer system that meets the system requirements for Windows 11.

2. Update Drivers

Outdated or incompatible drivers can also cause the (0xC19001-0x40021) error while upgrading to Windows 11. You can update the drivers manually by going to the manufacturer’s website and downloading the latest version. You can also use third-party driver updater tools to scan and update all drivers automatically.

3. Run the Windows Update Troubleshooter

Windows has a built-in troubleshooter that can fix various update-related issues. You can run the Windows Update troubleshooter by going to “Settings > Update & Security > Troubleshoot > Windows Update” and clicking on the “Run the troubleshooter” button. Follow the on-screen instructions, and the troubleshooter will scan for any problems and provide solutions.

4. Check for Corrupted System Files

Corrupted system files can also cause issues while upgrading to Windows 11. You can use the “SFC” (System File Checker) and “DISM” (Deployment Image Servicing and Management) commands in the Command Prompt to scan and repair any corrupted system files. To do this, open the Command Prompt as an administrator and type “sfc /scannow” and press Enter. Once the scan is complete, type “dism /online /cleanup-image /restorehealth” and press Enter. After the process is complete, restart your system and try upgrading to Windows 11 again.

5. Check for Sufficient Disk Space

Windows 11 requires at least 64GB of free disk space to install. If you do not have enough free space on your system, you may encounter the (0xC19001-0x40021) error. You can free up space by deleting unnecessary files or moving them to an

Check if the hardware is compatible with Windows 11

With the official release of Windows 11, many PC users are wondering if their current hardware is compatible with the new operating system. In this guide, we will discuss how to check if your hardware is compatible with Windows 11.

1. Check Microsoft’s minimum system requirements
The first step is to check the minimum system requirements for Windows 11 as provided by Microsoft. These requirements include a 64-bit processor, at least 4GB of RAM, 64GB of storage, and a Trusted Platform Module (TPM) version 2.0. If your hardware meets these minimum requirements, then it may be compatible with Windows 11.

2. Use Microsoft’s PC Health Check app
Microsoft has released a PC Health Check app specifically designed to check if your hardware is compatible with Windows 11. You can download this app from the Microsoft website and run it on your PC. The app will scan your hardware and let you know if it meets the requirements for Windows 11.

3. Check for TPM support in your BIOS
As mentioned earlier, Windows 11 requires a TPM version 2.0. You can check if your PC has TPM support by accessing your BIOS settings. The process may vary depending on your PC manufacturer, but usually, you can access the BIOS by pressing a key (such as F2 or Delete) during the boot process. Look for the TPM section in your BIOS and make sure it is enabled.

4. Check for UEFI support
Windows 11 also requires a Unified Extensible Firmware Interface (UEFI) instead of the traditional BIOS. You can check if your PC has UEFI support by accessing your BIOS settings and looking for the UEFI Boot option. If it is available, then your PC has UEFI support.

5. Check for 64-bit processor support
Windows 11 only supports 64-bit processors, so if your PC has a 32-bit processor, it will not be compatible. You can check your processor type by going to the Control Panel and clicking on System. Under the System section, you will see your processor information and whether it is 32-bit or 64-bit.

6. Check for driver compatibility
Some hardware components, such as graphics cards and network adapters, may require updated drivers to be compatible with Windows 11. You can check your hardware manufacturer’s website for updated drivers or use a driver update tool to ensure all your drivers are up to date.

In conclusion, checking if your hardware is compatible with Windows 11 is a simple process. By following the steps above, you can determine if your current hardware is compatible or if you need to upgrade certain components. It is always recommended to have compatible hardware before upgrading to ensure a smooth and stable experience with Windows 11.

Run the Windows Update Troubleshooter

Run the Windows Update Troubleshooter

Windows Update is an important component of the operating system that helps ensure the security and stability of your computer. However, it is not uncommon for users to encounter issues with Windows Update, such as failed updates, error messages, or the update process being stuck. In such cases, it is helpful to run the Windows Update Troubleshooter. In this blog, we will discuss what the Windows Update Troubleshooter is and how to use it to resolve Windows Update problems.

What is the Windows Update Troubleshooter?

Windows Update Troubleshooter is a tool developed by Microsoft to automatically diagnose and fix common Windows Update issues. It scans your system for any problems that may be preventing Windows Update from functioning properly and provides solutions to fix them.

How to run the Windows Update Troubleshooter?

To run the Windows Update Troubleshooter, follow these steps:

Step 1: Open the Settings app on your computer by pressing the Windows key + I or by clicking on the Start menu and selecting the gear icon.

Step 2: In the Settings app, go to Update & Security > Troubleshoot.

Step 3: Under Troubleshoot, locate Windows Update and click on it to expand the options.

Step 4: Click on the “Run the troubleshooter” button.

Step 5: The troubleshooter will now scan your system and detect any issues related to Windows Update.

Step 6: If any problems are found, the troubleshooter will provide steps to resolve them. Follow the on-screen instructions to complete the troubleshooting process.

Step 7: Once the troubleshooter has completed its scan, click on “Close” to exit the troubleshooter.

Step 8: Restart your computer and try to update Windows again.

If the troubleshooter was able to fix the issue, you should be able to update Windows without any problems. However, if the problem persists, you may need to try other solutions or seek further assistance from Microsoft support.

Other ways to troubleshoot Windows Update issues

If the Windows Update Troubleshooter was not able to fix the problem, here are some other solutions that you can try:

1. Restart your computer – Sometimes, simply restarting your computer can resolve Windows Update issues. This may seem like a basic solution, but it is always worth a try.

2. Clear the Windows Update cache – The Windows Update cache stores temporary files that are used during the update process. If these files become corrupted, it can cause issues with the update. To clear the Windows Update cache, follow these steps:

– Press Windows key + R to open the Run dialog box.
– Type “services.msc” and press Enter.
– In the Services window, locate “Windows Update” and right-click on it.
– Select “Stop” from the context menu.
– Now, open File Explorer and navigate to the following path: C:\Windows\SoftwareDistribution\Download
– Delete all the files and folders in this folder. If you are prompted for administrator permission, click on “Continue”.
– Go back to the Services window and right-click on “Windows Update” again.
– This time, select “Start” from the context menu.
– Restart your computer and try to update Windows again.

3. Use the System File Checker tool – The System File Checker tool is a built-in Windows utility that scans for and repairs corrupt system files. Follow these steps to run the System File Checker tool:

– Press

Reset every WU component

Without proper reset, you may encounter issues like Windows Update failing to download or install updates, slow internet or Wi-Fi connection, or computer freezing. To ensure proper functioning of WU components, follow these steps to reset them.

Reset Windows Update Components

1. Stop Windows Update Services
– Open Run dialog by pressing Windows + R keys and type in “services.msc”
– Search for the following services and right-click on each one to select Stop.
1. Background Intelligent Transfer Service (BITS)
2. Cryptographic Services
3. Windows Update

2. Rename SoftwareDistribution and Catroot2 folders
– Open File Explorer and navigate to C:\Windows
– Find and rename the SoftwareDistribution folder to “SoftwareDistribution.old”
– Similarly, find and rename the Catroot2 folder to “Catroot2.old”

3. Restart Windows Update Services
– Go back to the Services window (services.msc) and right-click on the services that you stopped earlier.
– Select Start for each service one by one.

4. Run Windows Update Troubleshooter
– Open Settings by pressing Windows + I keys and go to Update & Security.
– Click on Troubleshoot and then select Windows Update.
– Click on Run the troubleshooter and follow the on-screen instructions.

5. Reset Network Settings
– Open Command Prompt as an administrator by typing “cmd” in the search box, right-click on Command Prompt and select Run as administrator.
– Type the following commands one by one and press Enter after each one.
1. net stop wuauserv
2. net stop cryptSvc
3. net stop bits
4. net stop msiserver
5. ren C:\Windows\SoftwareDistribution SoftwareDistribution.old
6. ren C:\Windows\System32\catroot2 Catroot2.old
7. net start wuauserv
8. net start cryptSvc
9. net start bits
10. net start msiserver

Once you have completed the steps mentioned above, restart your computer and try to run Windows Update again. This should reset all the WU components and fix any issues you were facing while updating your Windows system.

In addition, make sure to regularly check for updates and install them to keep your system up to date and secure.

Downgrading to an older Windows 10 build (if applicable)

Upgrading to the latest Windows 10 build can bring a lot of exciting new features and improvements. But sometimes, these updates can also come with their fair share of bugs and issues. In such cases, many users prefer to downgrade to a previous version of Windows 10, which was working fine for them.

Here’s a step-by-step guide on how to downgrade to an older Windows 10 build if you’re facing issues with the latest one.

1. Backup your important data: Before proceeding with the downgrade, it’s crucial to backup all your important files and folders. This will ensure that no data is lost during the process.

2. Check your current Windows 10 build: To determine the version of Windows 10 you’re currently using, go to Settings > System > About. Note down the version number and build number.

3. Download the older build ISO: To downgrade, you’ll need an older build ISO file. You can download it from the official Microsoft website or from a trusted third-party website. Make sure to select the correct version and build number that you want to downgrade to.

4. Create a bootable USB or DVD: Once you have the ISO file, use a tool like Rufus to create a bootable USB or DVD. This will be used to install the older build on your system.

5. Restart your computer: Once you have the bootable USB or DVD ready, restart your computer and enter the BIOS settings. Change the boot priority to start from the USB or DVD.

6. Install the older build: Follow the instructions on the screen to install the older build of Windows 10. Select the option to keep your personal files and data when prompted.

7. Update your drivers: After the installation is complete, make sure to update your drivers to the latest versions. This will ensure that all your hardware is compatible with the older build.

8. Disable automatic updates: To avoid getting upgraded to the newer build automatically, go to Settings > Update & Security > Windows Update and click on “Advanced options”. From there, disable the option for “Receive updates for other Microsoft products when you update Windows”.

9. Restore your data: Once the installation and driver updates are complete, you can transfer your backed up data back to your computer.

10. Prevent future upgrades: To prevent future upgrades, you can use the Group Policy Editor to disable automatic updates (if using Windows 10 Pro) or use a third-party tool like Never 10.

Downgrading to an older Windows 10 build can be a time-consuming process, but it can be worth it if the newer build is causing major issues on your system. Just make sure to back up your data and follow the steps carefully to avoid any complications.

Uninstall Asus Xonar Driver prior to upgrading (if applicable)

Uninstall Asus Xonar Driver prior to upgrading (if applicable)

and Uninstall Asus Game First III and its related files.

Are you considering upgrading your computer’s hardware or software? If you are an avid gamer or a music lover, you may have heard of the Asus Xonar sound card and the Asus Game First III software. These are popular choices for enhancing your gaming and audio experience. However, before you proceed with your upgrade, it is essential to properly uninstall these components and their related files to prevent any conflicts or issues.

Uninstalling Asus Xonar Driver

The Asus Xonar sound card is a high-performance audio component that provides superior sound quality. If you are planning to upgrade to a new sound card or if you no longer require the use of this device, you will need to uninstall its driver.

Step 1: Open the Control Panel
The first step is to open the Control Panel on your Windows computer. You can do this by searching for “Control Panel” in the search bar or by clicking on the Windows icon on your taskbar and then selecting “Control Panel.”

Step 2: Go to Programs and Features
In the Control Panel, click on “Programs” and then select “Programs and Features” from the list of options.

Step 3: Find the Asus Xonar Driver
In the list of installed programs, locate the Asus Xonar Driver. You can either manually scroll down the list or use the search function to find it quickly.

Step 4: Uninstall the Driver
Once you have found the Asus Xonar Driver, right-click on it and select “Uninstall.” Follow the on-screen prompts to complete the uninstallation process.

Step 5: Restart your Computer
After the driver has been uninstalled, restart your computer to complete the process.

Uninstalling Asus Game First III

Asus Game First III is a software designed to optimize your network settings for gaming. However, it may not be compatible with some games and can cause issues. If you are planning to upgrade your computer, it is recommended to uninstall this software beforehand.

Step 1: Access the Control Panel
Open the Control Panel on your computer by following the same steps as mentioned earlier.

Step 2: Find Programs and Features
Click on “Programs” and then select “Programs and Features.”

Step 3: Locate and Uninstall Asus Game First III
In the list of installed programs, find “Asus Game First III” and right-click on it. Select “Uninstall” and follow the instructions to complete the uninstallation process.

Step 4: Remove Related Files
Once the software has been uninstalled, it is crucial to remove any related files manually. Go to the installation folders and delete any remaining files related to Asus Game First III.

Step 5: Restart your computer
As a final step, restart your computer to complete the process.

In conclusion, if you are planning to upgrade your computer, it is essential to properly uninstall the Asus Xonar Driver and Asus Game First III and their related files. This will ensure a smooth and hassle-free upgrade process. Make sure to follow the steps mentioned above to avoid any potential conflicts or issues.

Disable DRM software that interferes with the Win 11 upgrade (if applicable)

Windows 11 is the latest operating system from Microsoft, and many users are eagerly awaiting its release. However, some users may encounter issues when trying to upgrade to Windows 11 due to DRM (Digital Rights Management) software. DRM software is used to protect digital media from being copied or pirated, but it can also interfere with system processes and cause compatibility issues. In this blog post, we will discuss how to disable DRM software that interferes with the Windows 11 upgrade.

1. Identify the DRM software on your computer
The first step is to identify the DRM software that is installed on your computer. DRM software is commonly found in media players, such as iTunes, Windows Media Player, and Adobe Digital Editions. It can also be found in other applications that play or manage digital media, such as online streaming services or eBook platforms.

2. Check for updates
Before disabling DRM software, you should first check for any updates. Often, software updates include bug fixes and compatibility improvements. If a newer version of the software is available, it is recommended to install it before attempting to upgrade to Windows 11.

3. Uninstall the DRM software
If the DRM software is causing issues with the Windows 11 upgrade, the next step is to uninstall it. This will completely remove the software from your computer and prevent it from interfering with the upgrade process. To uninstall the software, go to the Control Panel, select “Programs and Features,” and then find the DRM software in the list. Right-click on it and select “Uninstall.”

4. Disable DRM services
If uninstalling the software is not an option, you can try disabling DRM services instead. To do this, open the Services tool by pressing Windows + R, typing “services.msc,” and pressing Enter. Look for any DRM-related services in the list, right-click on them, and select “Stop.” You can also change the startup type to “Disabled” to prevent the services from starting automatically in the future.

5. Use a DRM removal tool
There are also third-party DRM removal tools available that can help you remove the protection from your media files. These tools can be useful if you have a large collection of DRM-protected media and don’t want to uninstall or disable the software. However, use them at your own risk, as they may violate copyright laws.

6. Contact the software developer
If all else fails, you can contact the software developer for assistance. They may have a solution or workaround for the issue you are experiencing. Be sure to provide them with specific details about the problem and the steps you have taken to try to resolve it.

In conclusion, while DRM software is meant to protect digital media, it can sometimes interfere with system processes like the Windows 11 upgrade. By following these steps, you can disable or remove the DRM software and successfully upgrade to Windows 11. Remember to always try to update the software first and, if necessary, contact the developer for help.

Disable Antivirus Temporarily (if applicable)

Most antivirus programs are designed to run in the background and constantly scan your computer for malware and other threats. This is a great security measure, but sometimes it can be a hindrance when trying to install or run certain programs that are not recognized by the antivirus software.

In these situations, it may be necessary to temporarily disable your antivirus software in order to complete the task at hand. Here’s how to do it for some of the most popular antivirus programs:

1. Windows Defender
If you are using Windows 10, you probably have Windows Defender installed as your default antivirus software. To temporarily disable it, follow these steps:
– Open the Windows Defender Security Center by clicking on the shield icon in your taskbar, or by searching for it in the start menu.
– Click on “Virus & threat protection” on the left side of the window.
– Under “Virus & threat protection settings”, click on “Manage settings”.
– Toggle off the switch under “Real-time protection”. This will temporarily disable Windows Defender.

2. McAfee
To temporarily disable McAfee antivirus software, follow these steps:
– Right-click on the McAfee icon in your system tray (bottom-right corner of the screen).
– Select “Change Settings” and then “Real-time Scanning”.
– Click on the “Turn off” button and select a time frame for how long you want it to be disabled. Click “Done” to confirm.

3. Norton
To temporarily disable Norton antivirus software, follow these steps:
– Right-click on the Norton icon in your system tray.
– Select “Disable Auto-Protect”.
– Select the duration for which you want it to be disabled and click “OK”.

4. Avast
To temporarily disable Avast antivirus software, follow these steps:
– Right-click on the Avast icon in your system tray.
– Click on “Avast shields control” and then select “Disable for 10 minutes”, “Disable for 1 hour”, or “Disable until computer is restarted”.

5. Bitdefender
To temporarily disable Bitdefender antivirus software, follow these steps:
– Open the Bitdefender program.
– In the “Protection” window, click on “View Modules”.
– In the “Modules” area, click on the gear icon next to “Antivirus”.
– In the pop-up menu, select “Off” and then confirm your selection by clicking “Yes”.

It’s important to remember that disabling your antivirus software temporarily leaves your computer vulnerable to malware and other threats. Make sure to enable it as soon as you are done with the task at hand and to always keep it updated for the best protection.

Remove secondary SSD and any external devices (if applicable)

Remove secondary SSD and any external devices (if applicable)

As technology continues to advance, many computer users are looking for ways to optimize their system’s performance. One way to do this is by removing any unnecessary secondary SSD and external devices that may be connected to your computer. In this blog post, we will discuss the reasons why you should remove these devices and the steps to do so.

First, let’s start with the secondary SSD. A secondary SSD, or Solid State Drive, is an additional storage device that is often added to a computer to provide extra storage space or to improve the system’s overall performance. However, if you are not using this SSD on a regular basis, it may be causing more harm than good. Having multiple storage devices connected to your computer can slow down the system and increase boot times. Additionally, the more devices connected, the more power the computer needs to operate, which can lead to higher energy usage and increase your electricity bill.

To remove the secondary SSD, you will need to open your computer’s case. Before doing so, make sure to shut down your computer and unplug all cables. Next, locate the SSD and gently remove any screws or brackets holding it in place. Carefully take out the SSD and store it in a safe place for future use.

Now, let’s move on to external devices. These can include USB drives, external hard drives, printers, and other peripherals. Like the secondary SSD, having too many external devices connected to your computer can slow down performance and increase energy usage. Additionally, it can clutter your workspace and make it more challenging to locate the device you need.

To remove external devices, begin by safely ejecting them from your computer. Next, unplug any power cords and USB cables connected to the device. Finally, store the device in a safe place or disconnect it from your computer if you do not plan to use it anytime soon.

In some cases, your computer may require certain external devices, such as a keyboard or mouse, to operate. If this is the case, it is recommended to only keep the necessary devices connected and disconnect any unused ones.

In conclusion, removing secondary SSD and external devices when not in use can help improve your computer’s performance and reduce energy usage. It is also recommended to periodically clean out any unnecessary files and programs to further optimize your computer’s performance. We hope this blog post has provided you with valuable information on why and how to remove secondary SSD and external devices from your computer.


In conclusion, it can be frustrating to encounter errors while trying to upgrade to Windows 11, especially the 0xC19001 0x40021 error. However, with the right steps and troubleshooting techniques, this error can be resolved. We hope this article has provided you with the necessary information to successfully upgrade to Windows 11 without any hiccups. Remember to always consult official sources for support and tips, and don’t hesitate to reach out to Microsoft’s support team for further assistance. With the highly anticipated release of Windows 11, we hope you have a smooth upgrade process and enjoy all the new features and improvements it has to offer.

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