Microsoft on Tuesday released a beta version of its new free anti-virus offering, Microsoft Security Essentials (a.k.a “Morro”). My review, in short: the program is a fast, easy to use and unobtrusive new addition to the stable of free anti-virus options available today.MSE is basically the next generation of Microsoft’s Windows Live Onecare anti-virus and anti-spyware service, but without all of the extras, such as a firewall, data backup solution or PC performance tuning (Microsoft announced in Nov. 2008 that it would stop selling Onecare through its retail channels at the end of June 2009).
http://voices.washingtonpost.com/securityfix/2009/06/microsoft_debuts_free_antiviru.html