Windows 10 How to fix 'this app can't open' on Windows 10 Technical Preview

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• In this build, the Mail, Calendar, and People apps may be broken due to a licensing issue with the Store Beta. To get these apps working again, you need to follow these steps:
  • Open powershell as administrator
  • Run the command Get-appxprovisionedpackage –online | where-object {$_.packagename –like “*windowscommunicationsapps*”} | remove-appxprovisionedpackage –online
  • Re-install Mail, People and Calendar from the Store (green tile)

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