Microsoft Security Essentials is a free security software that is being developed by Microsoft. The security software was released as a limited beta to users in the United States, Brazil and China.MSE replaces Windows Live OneCare — a subscription antivirus service — and Windows Defender, which only protects users from adware and spyware. MSE is a small-footprint program ideal for computers that lack processing power or broadband Internet connections, such as netbooks.

Several updates of Microsoft Security Essentials were released since then and it was rumored that Microsoft aimed for a October 22 release to give Windows 7 users a chance to use the final version of the software program. The announcement that Microsoft Security Essentials would be released in the coming weeks was spread to all beta participants who received an email that informed them of an upgrade and the projected release in the coming weeks.

The final version of Microsoft Security Essentials will be released to the public in the coming weeks. If you are running the older version of the beta (1.0.1407.0), we encourage you to upgrade to a newer version of the beta (1.0.1500.0).

The announcement does not explicitly mention the Windows 7 release date but it seems pretty obvious that Microsoft Security Essentials final will be released around the time of the Windows 7 release. Users who want to test Microsoft Security Essentials right now can do so by following the links posted above. The final version will be published at Microsoft’s Security Essentials website.