AV-Test GmbH did a thorough test of Microsoft Security Essentials, with almost 3200 viruses, Trojans and worms. All files were detected by the AV, even those ones that aren’t yet detected and cleaned by other paid AV software. They also tested it for false positives, where an AV points out legitimate software as a virus, and even then MSE...

Microsoft Security Essentials Beta will be available for the first 75,000 users to download today. It will be available only to customers in the United States, Israel (English only), People’s Republic of China (Simplified Chinese only) and Brazil (Brazilian Portuguese only). Microsoft Security Essentials contains both an antivirus...