Share via

Fixing 0x80073CF3 on my own msix app

eli k 20 Reputation points
2025-11-23T21:50:07.0266667+00:00

Hello,

I recently published an update for my app on the Microsoft Store. The update appears to publish successfully, but when users attempt to install or update the app, they encounter error 0x80073CF3, with a message indicating a conflicting package.

I have verified the following:

No conflicting packages exist on the devices.

Completely uninstalling and reinstalling the app does not resolve the issue.

The app runs perfectly in development mode and passes all WACK tests locally.

No changes were made to the .csproj file, manifest, or AppX packages since the last successful version.

This issue is affecting all users, suggesting that the problem originates from the published package rather than user devices. I would greatly appreciate guidance on how to identify the cause such as logs, manifest checks, or known package issues so I can resolve it promptly.

Thank you for your assistance.

Windows development | Windows App SDK

1 answer

Sort by: Most helpful
Most helpful Newest Oldest
  1. Michael Le (WICLOUD CORPORATION) 6,020 Reputation points Microsoft External Staff Moderator
    2025-11-24T04:07:38.09+00:00

    Hello @eli k ,

    0x80073CF3 is for ERROR_INSTALL_RESOLVE_DEPENDENCY_FAILED

    This could happen even without manual changes to your project files. Possible causes include:

    • The incoming package conflicts with an installed package.
    • A specified package dependency can't be found.
    • The package doesn't support the correct processor architecture.

    How to identify the cause

    Open the Event Viewer and navigate to this path:

    Applications and Services Logs > Microsoft > Windows > AppXDeployment-Server > OperationalUser's image

    Look for error events (commonly ID 401 or 404) that occurred right after the failed install attempt. The details in those logs will tell you exactly which dependency package is missing or causing the conflict. Once you have the name of that specific package, you will know which part of your build configuration needs adjustment.

    1 person found this answer helpful.
    0 comments

Your answer

Answers can be marked as 'Accepted' by the question author and 'Recommended' by moderators, which helps users know the answer solved the author's problem.