The solution is simple to enforce updated when change the Local Group Policy settings, in Windows 8.1 or Windows 7 and 10?
When change the settings via "Local Group Policy Editor" (... see Image-2 Arrow-1)
Please use the command gpupdate /force to enforce the updated the new policy to have a effect on your Windows 8.1 PC.
Please press the [Windows-Logo + R] keyboard combination to start the RUN-Dialog in Windows 8.1 and enter the command gpupdate /force
To change other Settings via "Local Group Policy Editor" please RUN the command gpedit.msc (... see Image-2 Arrow-1)
... Disable the Windows Store in Windows 8.1!
This snap-in allows you to edit the local Group Policy Objects stored on the Windows 8.1 computer.
FAQ 218: Updated on: July 26th 2015 22:49