In AV Comparative's most recent report on malware removal, MSE was the only free antivirus rated Advanced+. That ranking placed it alongside big names like Norton, Kaspersky, and F-Secure. Security Essentials also beat out technician favorite ESET, which managed only an Advanced rating.
It's also worth noting that only three antivirus apps - Norton 2010, eScan, and Security Essentials - scored marks of good or better in removal of malware and removal of leftovers. So not only has MSE beaten free competitors like AVG (version 8.5 tested, not 9.0), Avira, and Avast, it also posted test scores equal to or better than a dozen antivirus programs you'd have to pay for.
Well done, Microsoft!
[via Ars Technica]