Microsoft Security Essentials v4 contains the following new features:
- Enhanced protection through automatic malware remediation – The Beta will clean high-impact malware infections automatically, with no required user interaction.
- Enhanced performance – The Beta includes many performance improvements to make sure your PC performance isn’t negatively impacted.
- Simplified UI – Simplified UI makes Microsoft Security Essentials Beta easier to use.
- New and improved protection engine – The updated engine offers enhanced detection and cleanup capabilities.