Windows 8 comes with some nice feature packed in it, Windows Store is one of them, Store allows you to download and install apps on your system so that you can enjoy nice app on your system for free.
Now if you wanna disable your Store then Click on Enable button and then click on OK button, if you don’t want to disable then click on Disable or Not Configured.
That’s it now your users wont be able to access store any more.