Dennis Publishing's security labs saw Microsoft Security Essentials fail to detect 39% of the real-world malware thrown at it. Dennis Technology Labs (DTL) tested nine home security products on a Windows 7 PC, including Security Essentials, which is distributed free to Windows users and built into Windows 8 in the form of Windows Defender. While the other eight packages all achieved protection scores of 87% or higher - with five scoring 98% or 99% - Microsoft's free antivirus software protected against only 61% of the malware samples used in the test. -snip- Norton Internet Security received the strongest protection rating...