MSE (Microsoft Security Essentials) is available for small businesses with up to 10 PCs. Targets may need to be restarted. Will not run on Windows 8.x or Server 2012. Return code 327424 = Successful Needs Reboot - 327426 = Already Installed. Return Code -2147156213 means Windows hasn't been activated or the WGA validation failed.
Package Library Subscription Level Basic
Package Library availability for Microsoft Security Essentials: