How to Fix Windows Error 0x80073CF9

What Causes This?

Windows error 0x80073CF9 usually appears when the Microsoft Store cannot install or update an app because something is wrong with the Store cache, temporary files, or system folders it depends on. It can also happen if Windows update components are stuck, your disk is low on space, or app package registration is damaged. In some cases, corrupted system files or permission problems in the Store install path trigger the error.

Common Symptoms

• Microsoft Store apps fail to install or update
• You see error code 0x80073CF9 during a download
• The Store opens, but installs stay pending or fail immediately
• Built-in apps like Xbox, Photos, or Calculator will not reinstall
• Windows feels cluttered or low on free storage

How to Fix It Manually

1. Restart your PC and check free disk space

   • Press Windows + E to open File Explorer.
   • Select This PC and check your C: drive.
   • If space is very low, delete unneeded files or empty the Recycle Bin.
   • Restart the PC before trying the Store again.

2. Clear the Microsoft Store cache

   • Press Windows + R to open Run.
   • Type wsreset.exe and press Enter.
   • A blank Command Prompt window will appear for a moment, then the Microsoft Store should reopen automatically.
   • Try installing the app again.

3. Run the Windows Store Apps troubleshooter

   • On Windows 11:
     • Open Settings with Windows + I.
     • Go to System > Troubleshoot > Other troubleshooters.
     • Find Windows Store Apps and click Run.
   • On Windows 10:
     • Open Settings > Update & Security > Troubleshoot > Additional troubleshooters.
     • Select Windows Store Apps > Run the troubleshooter.
   • Apply any fixes it suggests.

4. Repair or reset Microsoft Store

   • Open Settings with Windows + I.
   • Go to Apps > Installed apps on Windows 11, or Apps > Apps & features on Windows 10.
   • Find Microsoft Store, click the three dots or select it, then choose Advanced options.
   • Click Repair first.
   • If that does not help, return and click Reset.

5. Check system files with SFC and DISM

   • Right-click Start and choose Windows Terminal (Admin) or Command Prompt (Admin).
   • Run this command:

     sfc /scannow

   • When it finishes, run:

     DISM /Online /Cleanup-Image /RestoreHealth

   • Restart your PC after both scans complete.

6. Re-register the Microsoft Store

   • Open Windows Terminal (Admin) again.
   • Copy and paste this command, then press Enter:

     Get-AppxPackage -allusers Microsoft.WindowsStore | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppxManifest.xml"}

   • Wait for the command to finish, then restart Windows.

7. Install pending Windows updates

   • Open Settings > Windows Update.
   • Click Check for updates.
   • Install everything available, including optional quality updates if relevant.
   • Restart the PC and test the Store again.

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