I have no idea where these guys found it since Microsoft has not yet released it on their web site (it will be released this Tuesday) but it seems legit, I installed it and it works perfectly. http://tech.techteam.gr/microsoft-security-essentials-codename-morro-final-version-download/279/ It is a new antimalware (antivirus, antispyware, antirootkit) created by Microsoft for free. It is for Windows XP, Vista and 7.