I've been getting MDT working here and one of the annoyances is the corporate "required" legal notice pop up. This breaks MDT. The build process requires the local admin to log in and out a few times. There are a few work-arounds which I came up with however none are as simple and cool as the one suggested by Alex's blog http://blogs.msdn.com/b/alex_semi/archive/2009/08/28/avoiding-legan-notice-that-breaks-mdt-autologon.aspx Basically the idea is: Delay the domain join until the last minute. This avoids ever applying the GPO which forces the legal notice. Excellent.