Download Compiled Batch: http://anaheimofmanheim.com/Storage/winstore8.1fix.exe
I have taken time to make a compiled administrator batch script that will:
Delete the c:\windows\AInstallAgent folder
Create the c:\windows\AppReadiness folder
This fix is all I needed for this & I have had to use it several times since the installation of Windows 8.1.
Here is a link to the other fixes if that doesn’t work: