Windows 7: How to prevent users from changing my wallpaper?

I would like to specify a set of wallpapers to rotate,(a feature windows 7 has by default) and then make it impossible for any user, administrator or otherwise, to change that set. I know there has to be a way to do that, because there are multiple tutorials on how to lock just one wallpaper, I just want to take it to the next step, any help would be appreciated.



P.S
I have no reservations about editing the registry and am running Windows 7 home premium, please take this into consideration with your suggestions

Hello Geekman,

Normally, they would have to be logged in to your user account to change your wallpaper, unless they are an administrator and changed it through group policy.

If you are the only administrator on the computer that is password protected, and everyone had their own separate "Standard" user account, then they will not be able to change it.

Hope this helps,
Shawn

There is only one, administrator account that everyone uses, a bad idea yes, but I'm not allowed to change it

Then there's no way to prevent another user from changing the wallpaper since everyone is using the same account. An administrator account at that, so they all have full access to everything and can change anything.