Solrac,
Este assunto ja foi bem discutido aqui no forum, veja:
http://social.technet.microsoft.com/Forums/pt-BR/infrageral/thread/5370891c-5571-4159-a2f8-eb24a88247ba
http://social.technet.microsoft.com/Forums/pt-BR/520/thread/cfe77d57-299b-433d-a390-61cb5d722d73
http://social.technet.microsoft.com/Forums/pt-BR/infrageral/thread/b9663e2d-2d5e-4d8e-b63e-e1ab55c0fab0