2Mar/100
Add Windows Authentication Provider IIS 7 Windows 7
http://weblogs.asp.net/zroiy/archive/2008/08/17/missing-windows-authentication-provider-for-iis-7-on-windows-server-2008.aspx describes how to set up Windows Authentication providers in IIS 7 on Windows 2008; the image below shows how it's done in Windows 7