How to fix "Broken" Store Apps, Deployment failed: 0x80073CF6 & Merge Failure: 0x80070003 problems in Windows 10. (Solved)

In a Windows 10 machine, after November Update 1511,  the Start (Windows) button freezes and Cortana does not work. (This behavior is a common bug after Windows 10 1511 update that Microsoft has not fixed yet). 

To fix the Start button, Cortana and apps, we tried to re-register all modern apps by executing the following command, from the PowerShell (admin):

  • Get-AppXPackage | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}

But the results, during command execution and after that, are disappointing. More specifically:

1. During execution of the above command, the following repeated error is displayed on PowerShell window: "Deployment failed with HRESULT: 0x80073CF6, Package could not be registered. Merge Failure : error 0x80070003 : Cannot register the Microsoft App….. package because there was a merge failure with the following file…"

Deployment failed: 0x80073CF6, Merge Failure: 0x80070003


2. After the execution of the re-register Apps command, I realized that the Start button and Cortana are working again, but all Windows 10 Store Apps are broken and they are displayed under the "Other" section with a long weird filename with the following pattern: "@Microsoft.AppName_Version….." (see image below).

broken store apps windows 10


To fix the broken Store Apps "Deployment failed: 0x80073CF6, Merge Failure : error 0x80070003" & Broken Apps problems I tried BUT WITHOUT SUCCESS the following actions:

  1. To uninstall (or re-install) all Store Apps.
  2. To uninstall (or re-register) an individual Store App.
  3. To check and repair the Windows system for errors by using the SFC /SCANNOW command.
  4. To fix other Windows problems with the DISM tool (Dism /online /cleanup-image /restorehealth).

To make a long story sort, I decided to repair Windows 10 installation and then all Windows problems FINALLY were resolved at once. The repair operation takes about an hour and here are the steps I followed.

How to fix "Broken" Windows 10 Store Apps issue & Deployment failed: 0x80073CF6, Merge Failure:  0x80070003 errors when re-installing apps.


Step 1. Create a Windows 10 installation media.

1. Go to Get Windows 10 download site.

2. Download and save Windows Media Creation Tool (MCT) on your computer.

get windows 10 iso


3. When the download is completed, run the Media Creation Tool (MediaCreationTool.exe).

4. Accept the license agreement.



5. Choose Create installation media for another PC & click Next.

create windows 10 usb


6. At the next screen choose Next. *

* Note: There is no need to modify anything here. Windows have already chosen the right version and edition for the current computer.

download windows 10


7. Choose the type of Windows 10 media that you want MCT to create for you (USB or ISO) and click Next.

a. If you want to create a Windows 10 USB installation media, select USB flash drive and plug an empty USB stick (at least 4GB) on the computer.

b. If you want to download Windows 10 in a ISO file and burn it to a DVD, select ISO file and insert a blank DVD disk on the DVDRW tray.

create windows 10 iso


8. Now be patient until MCT downloads the Windows 10 install media. *

* Note: At the end of this process and if you have chosen to download an ISO file, choose to burn the files to a blank DVD.

9. When the tool finishes, continue to the next step.


Step 2. Repair and Upgrade Windows 10 instalaltion.

1. Put the Windows 10 Installation media you created at the previous step on the computer and explore its contents to locate and run the Setup application.

windows 10 repair


2. Press Yes at the UAC warning message and then be patient as Windows are preparing your system for repair.



windows 10 preparing


3. At the next screen, select the Download and install updates (recommended) option and click Next.

windows 10 upgrade repair


4. Then Windows check your PC.



5. Accept the license Terms.


6. Be patient until Windows 10 Setup downloads the available updates.


7. At the next screen choose Install. *

* Note: The repair install will keep all your files, personal settings and apps untouched.

repair windows 10

8. Now wait until Windows perform an in-place upgrade and repair you computer.

9. When the Repair/Upgrade is completed, you should login normally to your profile and the Store apps will be back!


You 're done!

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