Well, then, *I'm* sorry for being petty, but did you
actually try searching? Or
contacting MS?
Just for what it's worth...I'm not trying to tell you how to be a parent. But your system is safer if relatively few users have broad system priviliges. That's (1). I run *myself* with limited system privileges for this reason. Although naturally I have my own admin password.
(2) is that if you delete her MSN account, it's gone permanently, but she can make a new one if she wants to, and just go right back to using MSN. If you have to delete her account to stop her from using MSN, instead of just asking her, then clearly that's a realistic possibility. On the other hand, if you just use modified privileges to allow her to do everything she can do now except open the messaging software (this is different from using parental controls to restrict access to websites, but I'm sure you already know that), then whether or not she makes a new MSN account, she still can't use messaging. And should the rules change later, she's still got her old account to use.
So petty, perhaps, but it seems like a much more expedient solution....