Microsoft Security Essentials antivirus has the special place among hundreds of anti virus software. Microsoft Security Essentials is specially designed for all the Windows PC. Microsoft Security Essentials provide high class security against all type of viruses and malware. This free antivirus program is designed as user friendly and it's very easy to use.
Recently Microsoft has released the latest version of Security
Essentials for all existing and new clients. Now Microsoft allows Windows XP, Vista, 7 and 8 users to try this, even before the anti virus comes to market as final product. The new version is named build Microsoft Security Essentials 4.2.216.0 Prerelease. Users can download the copy in both x86 (32-bit) and x64 (64-bit).

Microsoft says about this prerelease version as follows,
“As a Microsoft Security Essentials Prerelease user, you will have the opportunity to explore and test new builds of Microsoft Security Essentials before they are publicly available and provide feedback to Microsoft. Your feedback helps Microsoft to make its software and services the best that they can be,”