I`m not sure whether this has been posted yet but the final release of Microsoft Security Essentials 2 is now available for download.
Code:
x86: http://mse.dlservice.microsoft.com/download/A/3/8/A38FFBF2-1122-48B4-AF60-E44F6DC28BD8/en-us/x86/mseinstall.exe
x64: http://mse.dlservice.microsoft.com/download/A/3/8/A38FFBF2-1122-48B4-AF60-E44F6DC28BD8/en-us/amd64/mseinstall.exe