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Modern Apps failed to start with error 5973

I started my Mail App and found it stop working, an error log was found in Event Viewers, which stated:

"Activation of app microsoft.windowscommunicationsapps_8wekyb3d8bbwe!Microsoft.WindowsLive.Mail failed with error: This app does not support the contract specified or is not installed. See the Microsoft-Windows-TWinUI/Operational log for additional information."

windows 8 app crash on open error log

It seems this error is common for a lot of Windows 8 users, but there's no fixed solution for this probem. In my case, I have a solution that finally fixed it

  • Open Run (Windows Key + R) and type it Regedit
  • Navigate to HKEY_CURRENT_USER\Software\Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppModel\SystemAppData
  • Right click, select Permissions and then add "ALL APPLICATION PACKAGES" to the "Group or user names" box and give full control to the registry key above

That's all!

windows  error  crash  
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