title: Not sure about what i understood about SSO / NTLM / Windows auth
body: <p>I'm working on an intranet application.
  I would like to connect the user w/o any form, so with his windows login.
  So I guess I have to use Windows auth.</p>
  
  <p>Is Windows authentication and NTLM the same thing ?
  Does it always ask the user to enter login/password ? because, i have enabled Windows auth on my website (and disabled others auth!) but when I go to the website, it asks me login/password in a pop up and what ever I type, it gives me error 401.</p>
  
  <p>So, is it possible to do what I want to ?
  And please, do you have any links to do it with IIS server on Internet explorer because i'm having a really hard time to find (and understand) informations on it :[</p>
  
  <p>Thanks for answers!</p>