Store won't open after upgrade
After upgrading Windows 8 Enterprise to Windows 8.1 Enterprise (RTM), the store app won't launch anymore, hanging on the splash screen forever. Is there a trick to reset the store app or something? Restarting or killing the app didn't work. There are no error messages in the event logs (TWinUI/Operational
etc.).
Solution 1:
Found this on another forum. Open a command prompt and run the following:
powershell -ExecutionPolicy Unrestricted Add-AppxPackage
-DisableDevelopmentMode
-Register $Env:SystemRoot\WinStore\AppxManifest.xml
(All on one line.)
Solution 2:
Method 1: I would suggest you to download and run the New UI App troubleshooter and check if Windows Store works.
http://download.microsoft.com/download/F/2/4/F24D0C03-4181-4E5B-A23B-5C3A6B5974E3/apps.diagcab
Method 2: Check if the date, time and time zone are set according to your time and time zone.
Source