There are many ways to accomplish this as I'm sure you'll see once people start replying, but I've always just used this command I came across a while back. It removes it completely without even the need for a reboot. Just paste it into run under the start menu.
RunDll32 advpack.dll,LaunchINFSection %windir%\INF\msmsgs.inf,BLC.Remove
Again, this is just one of many solutions...