Morro is finally available in beta, limited to users in the United States, Brazil, and Israel. The free security tool replaces Windows Live OneCare, which was a paid service. Available for 32- and 64-bit installations of Windows XP/Vista/7, it supplies you with protection against viruses, malware and others baddies on the Internet. Microsoft is hoping to target those who let their yearly software subscriptions expire, those who don’t buy it and users that never turned theirs on.