The first screenshots of Morro have leaked, showing an interface very similar to the one from Windows Defender.
Full Story: http://arstechnica.com/microsoft/news/2009/06/leaked-screenshots-of-morro-microsofts-free-antivirus.ars
Full Story: http://arstechnica.com/microsoft/news/2009/06/leaked-screenshots-of-morro-microsofts-free-antivirus.ars