Store Beta app does not work in Windows 10
befor
Fix: Windows 10 TP 10041 Previe10

  1. Open an elevated command prompt.
  2. In the elevated command prompt you opened, type the following:
  3. PowerShell -ExecutionPolicy Unrestricted -Command "& {$manifest = (Get-AppxPackage Microsoft.WindowsStore).InstallLocation + '\AppxManifest.xml' ; Add-AppxPackage -DisableDevelopmentMode -Register $manifest}"
  4. Press Enter and wait till the command finishes its work.
  5. Reboot Windows 10.

after
Fix: Windows 10 TP 10041 Previe11
Fix: Windows 10 TP 10041 Previe12

Fix Mail, Calendar and People in Windows 10 10041
before -> after

Fix: Windows 10 TP 10041 Fix10 - > Fix: Windows 10 TP 10041 Fix_af10

  1. Open PowerShell as administrator. See how to run an app as Administrator in Windows 10
  2. Copy and paste this in the window: Get-appxprovisionedpackage -online | where-object {$_.packagename -like "*windowscommunicationsapps*"} | remove-appxprovisionedpackage -online
  3. Press the Enter key to run the command.
  4. Re-install Mail, People and Calendar from the old Store app (the one with the green tile).