Prevent users changing desktop background slideshow via GP

Hello,

I have windows 8.1 pro and is a home pc not on a domain. I want to be able to prevent a user from changing the desktop background slideshow. I tried applying "prevent changing desktop background" in "user config\admin temps\control panel\personalization but when I apply that setting it stops the desktop background slideshow from changing. I have it on shuffle and rotate every 30 min. Would like to have the user not to be able to change the wallpaper slideshow and still have it rotate. Thanks.

Is that User set as Standard or as Administrator? There's a lot of things a Standard User can't do. Also important is to have Users with administrative rights use a password to log on. With Group Policy Editor the administrator can further lock things down.

It is an admin account and has a password. Any idea on my question above?