Hi everyone. Please be careful in updating the Windows 8.1 Latest updates that are released in Feb 2014. I guess the update for Windows 8.1 Security Update and Visual Studio Updates crashes down the boot for the Operating System. I reset/refresh the OS again and which is working fine when I roll back to the System Restore Point.
I suggest you to create a manual Checkpoint before you update the OS. So that it will be easy to recover when you failed to boot the OS.
Perform the Security Updates after that will recover the Store App too.