I cannot un- and re-install Teams

I found the solution in the WhastApp github issues:

There was an issue in the WinAppSDK 1.6.2 release which affected Windows 10 version 19045 machines. The 1.6.2 release has been pulled to prevent more machines being impacted. This issue was not caused by an update to Windows and will not be fixed by uninstalling any Windows Cumulative Updates. There is an upcoming Windows Update which will fix this issue (adding extra safety in Windows), and a release of WinAppSDK 1.6.3 is coming soon with a fix. Machines in a bad state can also be manually fixed by running these steps:

1. Launch a PowerShell or Command Prompt as Administrator and run these commands (change "Administrators" to whatever your Administrator group is named, if your Windows is not English; i.e. "Administratoren" in German):

takeown /F "C:\Program Files\WindowsApps\Microsoft.WindowsAppRuntime.1.6_6000.311.13.0_x64__8wekyb3d8bbwe\WindowsAppRuntime.DeploymentExtensions.OneCore.dll" 
icacls "C:\Program Files\WindowsApps\Microsoft.WindowsAppRuntime.1.6_6000.311.13.0_x64__8wekyb3d8bbwe\WindowsAppRuntime.DeploymentExtensions.OneCore.dll" /grant Administrators:F 
del "C:\Program Files\WindowsApps\Microsoft.WindowsAppRuntime.1.6_6000.311.13.0_x64__8wekyb3d8bbwe\WindowsAppRuntime.DeploymentExtensions.OneCore.dll" 
takeown /F "C:\Program Files\WindowsApps\Microsoft.WindowsAppRuntime.1.6_6000.311.13.0_x86__8wekyb3d8bbwe\WindowsAppRuntime.DeploymentExtensions.OneCore.dll" 
icacls "C:\Program Files\WindowsApps\Microsoft.WindowsAppRuntime.1.6_6000.311.13.0_x86__8wekyb3d8bbwe\WindowsAppRuntime.DeploymentExtensions.OneCore.dll" /grant Administrators:F 
del "C:\Program Files\WindowsApps\Microsoft.WindowsAppRuntime.1.6_6000.311.13.0_x86__8wekyb3d8bbwe\WindowsAppRuntime.DeploymentExtensions.OneCore.dll" 

2. Reboot
3. Launch a PowerShell as Administrator and run these commands:

Get-AppxPackage *WinAppRuntime.Main.1.6* -AllUsers | Where { $_.Version -eq '6000.311.13.0' } | Remove-AppxPackage -AllUsers 
Get-AppxPackage *MicrosoftCorporationII.WinAppRuntime.Singleton* -AllUsers | Where { $_.Version -eq '6000.311.13.0' } | Remove-AppxPackage -AllUsers 
Get-AppxPackage *Microsoft.WinAppRuntime.DDLM* -AllUsers | Where { $_.Version -eq '6000.311.13.0' } | Remove-AppxPackage -AllUsers 
Get-Appxpackage *WindowsAppRuntime.1.6* -AllUsers | Where { $_.Version -eq '6000.311.13.0' } | Remove-AppxPackage -AllUsers 

Source: https://github.com/microsoft/WindowsAppSDK/issues/4881#issuecomment-2480939942

Dear Ville,

Good day! Thank you for reaching out to the Microsoft Community. We are here to assist you.

The error code 0x80073cfa you're encountering typically arises due to issues with the Windows Store or the app's installation files. This error can be caused by corrupted installation files, problems with the Windows Store cache, or permission issues that prevent the app from being uninstalled or reinstalled correctly. Additionally, system file corruption or conflicting software on your system might be contributing to the problem. By following the troubleshooting steps belwo, we aim to address these potential issues and restore Microsoft Teams to proper functionality. If the problem persists, it might be helpful to check for any recent changes to your system, such as new software installations or updates, that could be causing the conflict.

It sounds like you've been through quite a bit trying to resolve this issue! Let's try a few more steps to fix the error code 0x80073cfa and get Microsoft Teams working again.

1. Reset Microsoft Store Cache

• Open Command Prompt: Press Windows + R, type cmd, and press Enter.
• Run WSReset: Type WSReset.exe and press Enter. This will reset the Microsoft Store cache.

1. Use PowerShell to Uninstall Teams

• Open PowerShell: Press Windows + X and select Windows PowerShell (Admin).
• Uninstall Teams: Enter the following command to uninstall Teams: Get-AppxPackage *Teams* | Remove-AppxPackage
• Uninstall Teams Machine-Wide Installer: Enter the following command to uninstall the machine-wide installer: Get-AppxPackage *TeamsMachineWideInstaller* | Remove-AppxPackage

1. Reinstall Microsoft Teams

• Download Teams: Go to the Microsoft Teams download page and download the installer.
• Install Teams: Run the downloaded installer and follow the on-screen instructions.

1. Run System File Checker and DISM

• Open Command Prompt as Admin: Press Windows + X and select Command Prompt (Admin).
• Run DISM: Type the following command and press Enter: DISM.exe /Online /Cleanup-image /Restorehealth
• Run SFC: After DISM completes, type the following command and press Enter: sfc /scannow

These steps should help resolve the issue. If the problem persists, I am sharing The Microsoft Community page with you referenced discusses the error code 0x80073cfa, which typically occurs when trying to uninstall or reinstall apps from the Microsoft Store. The page suggests several troubleshooting steps, including running the Windows Store Apps troubleshooter, resetting the Microsoft Store cache, and using PowerShell commands to force uninstall the problematic app.

Have a great day and take care! 😊 

Sincerely, 

Naren | Microsoft Community Moderator

Thank you so much, it worked perfectly. I couldn't uninstall Teams to reinstall it again and your command lines resolved the issue.

Hi Naren, thank you for your response.

I managed to run the first command, but got an error on the second one (PowerShell):
https://learn-attachment.microsoft.com/api/attachments/45dbad76-3a60-4300-ab46-05e4209180cc?platform=QnA