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How to Fix the Microsoft Store 0xc03f40c8 Error on Windows 10 & 11

The Microsoft Store is a great place to find Windows apps. You can search for and download almost all your favorite apps and games in no time.

However, when an app finishes its download you may get an 0xc03f40c8 error. If you’re facing this issue, we’ve listed some tried and tested methods for fixing the Microsoft error code 0xc03f40c8 on Windows.


What Causes the Microsoft Store 0xc03f40c8 Error?

The Microsoft Store 0xc03f40c8 error may arise due to the following reasons:

  • A slow internet connection is one of the main causes behind the Microsoft Store 0xc03f40c8 error.
  • The chances are that the downloaded app files got corrupted during the download process and led to the mentioned error code.
  • Another possibility is that the Microsoft Store cache files are corrupt. Windows stores some essential files (cache) that help the Microsoft Store run properly. If the cache files get messed up, you might have problems with the Microsoft Store.


Now you know all the causes behind the Microsoft Store error code 0xc03f40c8, keep reading for the suggested methods to fix it.

1. Use the Windows Store Apps Troubleshooter

Microsoft has developed many different troubleshooters for resolving Windows-related issues. One of them is the Windows Store Apps troubleshooter, which is a fantastic way to fix all kinds of Store issues.

Here’s how you can launch the Windows Store Apps troubleshooter in Windows:

  1. Open Windows Settings by pressing the Win + I keys together.
  2. Under the System tab, click Troubleshoot > Other Troubleshooters.
  3. Scroll down and click Run next to the Windows Store Apps option.
  4. Follow the instructions on the screen and apply all the fixes the troubleshooter recommends.
  5. Once you’ve applied all the fixes, click Close the troubleshooter and restart your PC.


That’s it. Now, you can check if the error code appears or not by downloading and updating apps in the Microsoft Store.

2. Troubleshoot the Network

A poor network connection is the most common cause of the error code 0xc03f40c8.

When you download an app with a slow connection, the Microsoft Store sometimes fails to download some data during the process. This eventually leads to issues like apps crashing in Windows and different error codes.

For troubleshooting the network, you can run the Internet Connections troubleshooter first, followed by the Network Adapter troubleshooter. If you’re not a geek, check out our how to fix no internet access on Windows article for detailed steps.

3. Re-Register the Microsoft Store App Using PowerShell

In layman’s terms, re-registering the Microsoft Store app means re-installing it on Windows. If you’ve already tried the above methods but are still struggling with the error code, re-registering is the way to go.

Follow the below-given steps to re-register the Microsoft Store app using PowerShell:

    1. Right-click the Start menu button and click Windows PowerShell (Admin).
    2. Now, copy the command given below and paste it into the PowerShell:
      Get-AppxPackage -AllUsers *WindowsStore* | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)AppXManifest.xml"}
    3. Press the Enter key on your keyboard to execute the command.
    4. Once done, restart your PC and open the Microsoft Store again to check for the error code.

    If you get the “A positional parameter can’t be found” error, copy the code again and make sure not to copy anything extra. This only occurs when the code you’ve entered includes an additional space line.

    4. Delete the Microsoft Store Cache

    Cache files are temporary files stored by apps to help them operate smoothly, and the Microsoft Store has its own. If you can’t download or update any apps from the Microsoft Store, clearing the cache may help.

    Here are the steps to clear the cache files of the Microsoft Store:

    1. Press Win + E to launch File Explorer.
    2. Go to the following location: C:Users<Username>AppDataLocalPackagesMicrosoft.WindowsStore_8wekyb3d8bbweLocalCache and delete all the files in the current folder.
    3. Now, navigate to C:Users<Username>AppDataLocalPackagesMicrosoft.WindowsStore_8wekyb3d8bbweLocalState location , replacing <Username> with your own name.
    4. Delete all the files in the LocalState folder.
    5. Open the Microsoft Store and download any app to see if the error code still appears.

    5. Reset the Microsoft Store

    Resetting the Microsoft Store is highly recommended if all the basic troubleshooting methods fail to work for you. You don’t need to worry about your files, as resetting the Microsoft Store doesn’t delete the installed apps or change your current account settings.


    Check out our quick guide on how to reset the Microsoft Store in Windows 10 and 11 for help.

    6. Choose the Appropriate Date and Time

    The Microsoft Store downloads all the apps and games from a secure server. This server double-checks that the date and time on the client’s side is correct. So, if you’ve accidentally changed the date and time on your PC, you may have unknowingly triggered the error code 0xc03f40c8.

    Follow our guide on how to change the date and time in Windows to fix such download errors. Once done, don’t forget to clear the DNS cache by typing the following command in the Command Prompt:

    ipconfig /flushdns

    7. Repair Any Corrupt Windows Files

    If none of the above-mentioned methods worked for you, the chances are that the core Windows files are corrupted.

    There are many different reasons why a file gets corrupted, such as system instability and malware, to name a few. If this is the case with you, you have two options: you can either repair the corrupted Windows files or factory reset your Windows PC or laptop.

    Before proceeding, note that a factory reset will result in complete data loss and that Windows will reset to its default state. So, don’t forget to have a complete backup of all your important files before you perform one.

    Fix Your Issues With Microsoft Store Apps

    Hopefully, if you’ve followed the guide correctly, the error code 0xc03f40c8 should not appear again.

    Sometimes these errors seem to crop up by themselves, but sometimes they’re because of something the user does. For example, you can prevent many Windows-related errors by just keeping your Windows up-to-date.

    Read the full article here

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