The issue arises when many of the default system apps are set to open with WinRT Storage API. This issue mainly affects the system’s built-in apps like Calc, Photos, etc. When a user encounters this issue,  the Microsoft Store might also fail to launch.

Use the PowerShell to Remove WinRT Storage API from the Default App

To restore the Apps association to the defaults and solve the WinRT Storage API issue, you can use the PowerShell cmdlets. Before moving on, create a system restore point if things do not go well. If so, then you may have to reinstall some built-in applications (like Calculator, Photos, etc.). For illustration, we will discuss the reinstallation process for the Microsoft Photos. You may have to repeat the same to install all other built-in apps (if required). To find a URL for another application, you may Google the application name with the Microsoft Store name like Calculator Microsoft Store. If the issue persists, then you may have to perform an in-place upgrade (download the ISO file of Windows 10 and launch its setup file as administrator). If that fails, then you may have to perform the clean installation of Windows 10.

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