Microsoft Windows Error Code 0x80073CF9: How to Fix It

Medium 30–90 minutes depending on steps required Medium Severity Verified July 2026
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Error Code
0x80073CF9
Brand
Microsoft Windows
Product Type
operating_system
Severity
Medium
DIY Difficulty
Medium
Estimated Fix Time
30–90 minutes depending on steps required
Error code 0x80073CF9 appears in Microsoft Windows when the Microsoft Store fails to install or update an app package. This typically happens due to corrupted Store cache files, a damaged app package, misconfigured Windows Update components, or insufficient permissions in key system folders. The good news is that most cases can be resolved without professional help by following a series of targeted software fixes.
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Tools You'll Need

How to Fix Error Code 0x80073CF9

  1. Run the Windows Store Apps Troubleshooter

  2. Reset the Microsoft Store Cache

  3. Re-register All Microsoft Store Apps via PowerShell

    Run this command only in an Administrator PowerShell or Terminal window. Do not close the window mid-process, as this can leave packages in a broken state.

  4. Check and Repair Windows System Files with SFC and DISM

    Do not interrupt the SFC or DISM scan. Interrupting these processes can cause additional file corruption.

  5. Reset Microsoft Store App Settings

    Resetting the Store will sign you out and clear any locally cached login data. You will need to sign back in with your Microsoft account.

  6. Verify and Repair Windows Update Components

  7. Check Folder Permissions for the WindowsApps Directory

    Modifying system folder permissions carries risk. Only change the owner to your own user account and do not delete or modify any existing permission entries for SYSTEM or TrustedInstaller.

  8. Install Pending Windows Updates

  9. Temporarily Disable Antivirus or Third-Party Security Software

    Only disable your antivirus temporarily and in a trusted network environment. Re-enable it immediately after testing.

  10. Perform a Repair Install of Windows (In-Place Upgrade)

    Back up all important files to an external drive or cloud storage before performing a repair install. Although data loss is rare with this method, it is not impossible.
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When to Call a Professional

Contact a professional technician or Microsoft Support if: error 0x80073CF9 persists after completing all steps including the repair install; you are unable to take ownership of the WindowsApps folder due to persistent permission denials; the SFC or DISM scans report errors they cannot repair; or your Windows installation appears severely corrupted with multiple services failing to start. Microsoft's official support can be reached at support.microsoft.com and offers both chat and remote assistance options.

Frequently Asked Questions

What does Windows error code 0x80073CF9 mean?
Error 0x80073CF9 means the Microsoft Store failed to install or update an app package. It is usually caused by a corrupted Store cache, damaged system files, incorrect folder permissions on the WindowsApps directory, or a conflict with Windows Update components.
Will fixing error 0x80073CF9 delete my files or installed apps?
Most of the fixes — such as resetting the Store cache, running SFC/DISM, or re-registering apps — will not delete your personal files or installed apps. Only the final repair install step (in-place upgrade) carries any risk to data, which is why backing up beforehand is strongly recommended.
Why does 0x80073CF9 keep coming back after I fix it?
If the error returns repeatedly, the root cause may not have been fully resolved. Common recurring causes include a third-party antivirus blocking Store operations, a pending Windows Update that keeps failing, or an underlying disk error corrupting files. Run a disk check using 'chkdsk /f /r' in an Admin Command Prompt and ensure Windows Update is fully current.
Can I manually install the app package to bypass error 0x80073CF9?
In some cases, yes. If the developer provides a standalone .msix or .appxbundle file for their app, you can try right-clicking the file and selecting 'Install' or running it directly, which bypasses the Store installer. However, this option is not available for all apps, and the same underlying system issues may still block the install.
Does error 0x80073CF9 affect only one app or all Microsoft Store apps?
It depends on the cause. If only one specific app triggers the error, the issue is likely with that particular package or its manifest. If all Store apps fail to install or update with this error, the problem is system-wide and points to corrupted Windows components, a damaged Store installation, or a permissions issue with the WindowsApps folder.

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