Microsoft store app update or installation error 0x80073cf9 [Solved]

Microsoft Store on Windows 11 is used to download apps and games and update existing ones. But sometimes app installation or update may fail with the error “app couldn’t be installed error 0x80073cf9“. A number of users report this error code 0x80073cf9 while they trying to install or update apps from the Microsoft Store on Windows 11. This problem usually occurs because of a corrupt or damaged Windows Store cache or a problem with the app package itself. Again problems with Internet connection, security software blocking the download or Windows 11 files corrupted also may cause Microsoft store Error 0x80073cf9 and stop you from installing apps.

How to fix Microsoft Store app installation error

Well, there are multiple solutions you can apply to fix the Microsoft Store app installation error on Windows 11. Installing the latest Windows updates and clear the Windows store cache is one of the most effective ways to fix such problems on Windows 11. Again you need to ensure the internet is working to download app or app updates from the Microsoft server. In addition, disconnect VPN and disable third-party antivirus and try again to install or update the app help most users fix the problem.

• Let’s first reboot your computer, this will refresh the operating system, wipe up the memory, restart all programs and clear temporary glitches which may fix the problem as well.
• The next thing you need to ensure your internet connection is working, you can check internet speed at fast.com or speedtest.net. Disconnect VPN if connected and disable security software.
• Try to Log out from the Microsoft Store and log in again, in addition, check the Region, Time and Date settings are correct.
• Now press the Windows key + R, type wsreset.exe and click ok, Wait for the process to complete, and then try to install or update the app again.

Restart the Windows update service

If for any reason, the Windows update service is not started or is stuck running you may experience problems install or update apps on the Microsoft Store. Let’s check and ensure the service is running or restart it.

• Press the Windows key + R, type services.msc and click ok
• Scroll down to locate Windows update service, right click and select restart
• If the service is not started, double-click on Windows Update to open properties,
• Here change the startup type automatic and start the service next to the service status.
• Click apply and ok to save changes, now ope Microsoft Store and try download an app or game.

In addition, do the same for Background Intelligent Transfer services.

Run store troubleshooter

Run the related troubleshooter that automatically detects and fixes problems prevent Microsoft Store download or updating apps, and games on your computer.

•  Press the windows key + x and select settings
• Go to the system then troubleshoot and click on Other troubleshooters,
• Here click Run next to Windows Store Apps and follow the on-screen instructions.
• This will scan for problems, check its related services running, clear the store cache and fix common problems that cause the Microsoft store not working on Windows 11.

Clear the App Cache

Sometimes the issue is with the app package itself, and clearing the app cache may help resolve the error. To clear the app cache, follow these steps:

• Open the Settings app using the Windows key + I
• Go to Apps then install the Apps option
• Locate the app that’s giving you the error and click on it. (Or you can select Microsoft Store)
• Click on Advanced Options. Under the “Reset” section, click on the “Reset” button.
• Wait for the process to complete, and then try to install or update the app again.

Re-register the Microsoft Store

If resetting the cache or clearing the app cache doesn’t work, you can try re-registering the Microsoft Store app. To do this, follow these steps:

1. Press the Windows key + X and click on Windows PowerShell (Admin).
2. Type the following command and press Enter: “Get-AppXPackage WindowsStore -AllUsers | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register “$($_.InstallLocation)\AppXManifest.xml”}”
3. Wait for the process to complete, and then try to install or update the app again.

Create the AUInstallAgent folder

It is another effective way to fix Microsoft Store error 0x80073CF9 on Windows 11. On the Microsoft forum, users report that creating the AUInstallAgent folder helps them fix the problem.

• Press Windows key + I to open File Explorer,
• Navigate C:\Windows\ and look if the AUInstallAgent folder is present there.
• If not, right-click and create a new folder and rename it to AppReadiness create one more folder and name it AUInstallAgent.

Once done, restart your PC, open the Microsoft Store and try to download any apps or games from there.

Run system file checker

Also, corrupted system files on your computer also cause this error 0x80073cf9 while installing Microsoft Store apps. Lets scan and restore missing, damaged system files using the SFC utility.

• Press Windows key + S, type cmd and click on run as administrator
• Type the command sfc /scannow and hit the enter key.

This will start the scanning for missing or corrupted system files. If any sfc utility restores them from A special folder located on %WinDir%\System32\dllcache. Wait until 100% complete the scanning process then restart Windows. Now open the Microsoft Store and try to install any app from there.