Quick fix: 0x80073CF9 means “App package family conflict” — another app already registered the same package family name or a previous install left orphan registration. Reset the conflict: Get-AppxPackage -AllUsers | Where-Object Name -like “*AppName*” | Remove-AppxPackage -AllUsers in elevated PowerShell, then retry install.
You try to install a specific Microsoft Store app. Install fails with 0x80073CF9. The error is package-related, not network-related. Often happens when you previously installed (then uninstalled) the same app, or its dependencies are stale.
Affects: Windows 11 with Microsoft Store.
Fix time: 10 minutes.
What 0x80073CF9 means
The code maps to The app couldn’t be installed because of conflicts with another app. It’s about package registration, not signing. The app’s package family name (a unique ID) conflicts with another registered package, or a previous install’s residual data is in the way.
Method 1: Remove existing package entirely
- Open elevated PowerShell.
- Find the package:
Get-AppxPackage -AllUsers | Where-Object Name -like “*AppName*”. - Remove for all users:
Get-AppxPackage -AllUsers | Where-Object Name -like “*AppName*” | Remove-AppxPackage -AllUsers. - Also deprovision:
Get-AppxProvisionedPackage -Online | Where-Object DisplayName -like “*AppName*” | Remove-AppxProvisionedPackage -Online. - Retry install from Store.
Method 2: Reset Microsoft Store and clear cache
- Run
wsreset.exe. - Then
Get-AppxPackage *WindowsStore* | Reset-AppxPackage. - Sign out and back in.
- Retry app install.
Method 3: Use winget instead of Store GUI
- Open Terminal.
- Run
winget install AppPackageFamilyName. - winget handles package conflicts differently and often succeeds where Store fails.
Verification
- App installs successfully.
- App appears in Start and runs.
Get-AppxPackage -Name *AppName*shows the new install.
If none of these work
If 0x80073CF9 persists after package cleanup, an admin policy may be blocking install (AppLocker, Smart App Control). Check Event Viewer for the specific block. For corporate-managed apps, IT must approve installs at the tenant level.
Bottom line: 0x80073CF9 = package conflict. Force-remove the conflicting package via PowerShell, deprovision system-wide, and retry. winget is a useful alternative.