Microsoft released its Microsoft Security Essentials, the free successor to its OneCare security program.
MSE uses the same antivirus engine as the phased out OneCare, but the new free program focuses only on malware blocking. It doesn't include a firewall, system optimizer or other security suite type features.
With a 97.8 percent overall block rate as tested by AVTest.org. It did shine in proactive tests that simulate how well an antivirus program can detect new malware that doesn't yet have a signature, and its performance there was topped only by Avira's AntiVir Personal.
Today's MSE, now available for download, doesn't add any new features or look any different from the beta version I reviewed, according to a Microsoft spokesman. The final version only includes some "code quality improvements, bug fixes, etc." when compared with that beta.