I give myself administrator permission to access C:\Program Files\WindowsApps\ and i was able to read it but i can't modify it. it says "You need permission to perform this action. You require permission from Administrator to make changes in this file" A guy named Justin, was able to modify apps on Windows 8 without any permission denied errors, but i have no idea how he did. he only tell us how to get read permission and not write permission. I have tried another way to give myself admin access but it did not work.

What i want to do is modifying the background image and colors on some apps like Justin did. I love modifying themes.