There are some reports floating around that the Windows Store app stops functioning after an upgrade to Windows 8.1.

I am not sure how widespread the issue is but there is a post by Luis Cantero on his No Time blog on MSDN, which I saw earlier today, and I thought I would publish it here to get it out there on a wide scale in case someone needed it.

According to Luis these are some of the situations you will see with the Windows Store in 8.1:

  • Sometimes, after upgrading to Windows 8.1, the Store App may not start.
  • It might still show the number of available updates on the Live Tile.
  • Starting the app may show a progress ring but it may not finish loading.

He said the fix is to type this command in a Command Prompt on your system:

powershell -ExecutionPolicy Unrestricted Add-AppxPackage -DisableDevelopmentMode -Register $Env:SystemRoot\WinStore\AppxManifest.xml

I would also imagine you need to do this an a Command Prompt window that has Admin rights.

Source: Fix Store App in Windows 8.1 (MSDN Blog of Luis Cantero)