Microsoft Security Essentials - Microsoft Software Program

Martin Brinkmann
Sep 22, 2009
Updated • Dec 10, 2014
Antivirus, Security, Windows software

Microsoft Security Essentials is a free security software that is developed by Microsoft. The security software was released as a limited beta to users in the United States, Brazil and China.

It was (actually still is) possible to download the beta from download portals like Betanews without any limitations or issues even if you don't live in one of the aforementioned countries.

That's what many users did and most seemed to have been pleased with the performance of the security software.

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 If you are running the older version of the beta (1.0.1407.0), we encourage you to upgrade to a newer version of the beta (1.0.1500.0).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 the final release will be available 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 on Microsoft's Security Essentials website.

Update: Microsoft Security Essentials 2.0 Final released

Update 2: Microsoft Security Essentials is fully compatible with Windows Vista and Windows 7. The company has merged the program with Windows Defender in Windows 8 which is why it is not available on that operating system as a standalone application.


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  1. Jake said on September 14, 2012 at 6:25 pm

    I’ve had Microsoft Security Essentials for awhile on my desktop PC and really like it. I also installed it on the laptop that I got for Christmas last year. Not only is the program free, but it works very well with both screen readers which I use. It also works with the screen reader that a sister of mine uses, so I definitely give it a thumbs up. In addition, a former colleague of mine who was fully-sighted, recommended the program highly when I was talking with him about my laptop.

  2. karnisha said on November 1, 2011 at 9:19 pm

    hi everybody watz up today i am in school i just got no just to see watz up

  3. UsedUniverse said on February 10, 2010 at 8:26 pm

    I have Microsoft Security Essentials on my computer at work which is XP and it works fine, at home i installed MSE and it kept freezing up my system (Vista), i think it my conflict with Zone Alarm. I also installed it on a friends laptop with Windows 7 and it kept freezing the computer. Had to go back to AVG.
    As much as i would like to use this at home- i can’t. I’m so tired of hunting down solutions to program problems, why can’t something work right at the get go. meh.

  4. techguru said on October 5, 2009 at 12:10 pm

    As you know Microsoft has released a free antivirus called Microsoft Security Essentials which is aimed primarily at emerging markets and it promises a basic protection and a simple interface. Microsoft Security Essentials is the replacement of Windows Live OneCare, which was paid. A transition for free of use which also means that less functionality for a solution to fight in real time against viruses, spyware, trojans and rootkits. This loss of functionality is the mockery of publishers who market competitive solutions. For more information on it’s installation and interface visit

  5. Transcontinental said on September 22, 2009 at 2:10 pm

    I have found and downloaded Microsoft Security Essentials 1.0.1500.0 and will likely try it, though after having proceeded to a ghost copy of my system disk!
    Now, as for what I discovered about ‘Microsoft Security Essentials’ install, I read the following:

    “[…] By using this program you agree to let Microsoft make changes to your system, such as enabling features that keep your system up to date and make it safer for you to browse the Internet.”

    Does anyone know what this statement includes, implies? For instance, does this mean that Microsoft Automatic Updates will be triggered on?
    I don’t care frankly to have my computer reconfigured according to Microsoft’s views of recommended system layout…

  6. Martin said on September 22, 2009 at 11:40 am

    There are public updates and internal updates..

  7. DanTe said on September 22, 2009 at 6:27 am

    An ad for StopZilla popped up on this article. I know it smells higher than month old socks. But I clicked on it anyway, just to see. It loads adwares gallore onto the virtual PC.

    I’m not sure if you can control this Martin. But pop up ads for spyware tends to drop a site’s credibility.

    P.S. CyberDefender ad also popped up. Bad mojo man.

  8. kevin said on September 22, 2009 at 4:49 am

    I’m looking forward to it.

    —–Posted in PIMShell
    –PIMShell is the first Feed Reader which supports tracking and posting comments.

    1. kevin said on September 22, 2009 at 4:54 am

      @ kevin
      test for reply.

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