How to Fix the "Class Not Registered" Photos App Error. Learn the causes and solutions of when your iOS device is unable to register a photo class you are trying to use.

Have you ever encountered the dreaded “Class Not Registered” Photos App error? It’s one of the most common and frustrating issues that Windows users can experience.

The “Class Not Registered” error may appear when trying to open the Photos app, but it can also occur when attempting to access other applications. This error typically indicates that either a data file or registry setting associated with the app is corrupted or incorrect.

In this article, we’ll explain what causes this error and how to fix it. We’ll also provide step-by-step instructions so that you can get your Photos app back up and running in no time.

What Is the “Class Not Registered” Photos App Error?


The “Class Not Registered” Photos app error is a common issue with Windows users. It’s an error that appears when the Photos app is unable to launch, typically due to a misconfiguration or corruption of a data file or system settings.

When the “Class Not Registered” Photos app error appears, it can be very frustrating. Fortunately, there’s no need to panic, as there are a few simple steps you can take to get the Photos app back up and running.

What Causes the “Class Not Registered” Photos App Error?



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    There are a few different causes for the “Class Not Registered” Photos app error. These include incorrect file type associations, system file corruption, and incorrect registry settings.

    • Incorrect File Type AssociationsOne of the most common causes of the “Class Not Registered” Photos app error is incorrect file type associations. This occurs when the Windows operating system is unable to determine which application should be used to open a specific file.
    • System File CorruptionSystem file corruption is another potential cause of the “Class Not Registered” Photos app error. This occurs when important Windows files are corrupted or missing, which can prevent the Photos app from launching correctly.
    • Incorrect Registry SettingsIncorrect registry settings can also lead to the “Class Not Registered” Photos app error. This occurs when registry settings associated with the Photos app are either corrupted or incorrect.

    How to Fix the “Class Not Registered” Photos App Error


    Fortunately, there are a few simple steps you can take to fix the “Class Not Registered” Photos app error. These include restoring default file type associations, running System File Checker, running the DISM tool, resetting the Photos app, and re-registering the DLL file.

    • Restore Default File Type Associations: The first step to take when trying to fix the “Class Not Registered” Photos app error is to restore Windows’ default file type associations. This can be done by running the System File Checker tool, which is included with Windows.
    • Run System File Checker: To run System File Checker, open the Run dialog box (Windows + R) and type “sfc /scannow” without the quotation marks. This will scan your system files and replace any that are corrupted or missing.
    • Run the DISM Tool: The DISM (Deployment Image Servicing and Management) tool can also be used to repair corrupted system files. To run the DISM tool, open the Command Prompt (Windows + X) and type “dism /online /cleanup-image /restorehealth” without the quotation marks.
    • Reset the Photos App: If the above steps don’t resolve the “Class Not Registered” Photos app error, you can try resetting the Photos app. To do this, open the Settings app and navigate to Apps > Apps & Features. Select the Photos app and click on Advanced Options. Finally, click on the Reset button.
    • Re-register the DLL File: If the Photos app is still not working, you can try re-registering the DLL file associated with the Photos app. To do this, open the Command Prompt (Windows + X) and type “regsvr32 ”C:\Windows\system32\appxdeploymentclient.dll” without the quotation marks.


    The “Class Not Registered” Photos app error can be very frustrating, but fortunately, it’s relatively easy to fix. In this article, we’ve explained what causes this error and provided step-by-step instructions for resolving it. The solutions include restoring default file type associations, running System File Checker, running the DISM tool, resetting the Photos app, and re-registering the DLL file.


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