Windows 7: Blocking access for guest users too configuration screen

Hi,

Can someone tell me how I can block the acces to the configurationscreen for guestusers.

I've got windows7, I made an administrator acoount and a guestaccount. Now the problem is that I use 2 screens foor my work, but when the guestaccount is beiing used they only need one screen. so they reconfigure it, whit the following problem I have to reorganize my maps again on my desktop. and reconfigure use to 2 sreens.

Can someone tell me what i can do about it?