If you're currently experiencing abandonment issues from the Windows Store after upgrading to Windows 8.1, don't panic there is hope.
You may see the Windows Store loading screen stuck in perpetual loop without end.
There is a relatively quick and painless fix.
You may have seen other sites recommend running the WSreset.exe tool, or manually trying to clear the cache from the Windows\SoftwareDistribution\Download folder.
Don't. This can happen when the Store needs to be re-registered after an upgrade.
Open a Command Prompt as an Administrator.
In the Administrator Command Prompt
type or paste the following command:
powershell -ExecutionPolicy Unrestricted Add-AppxPackage -DisableDevelopmentMode -Register $Env:SystemRoot\WinStore\AppxManifest.xml
Now in that same Administrator Command Prompt type or paste: start "" "ms-windows-store:"
Voila. Enjoy installing some new Store apps.
Update 10/2/2014 – I’ve had several users contact me that this also works when testing the Windows 10 Technical Preview which you can get here - Windows 10 Technical Preview
UPDATE – DO NOT USE THESE STEPS FOR Windows 10! Please see
Windows App Store doesn’t load after Windows 10 Upgrade - http://bit.ly/Win10AppStore