Join the Microsoft Security Essentials Ongoing Beta

Martin Brinkmann
Nov 30, 2009
Updated • Jan 28, 2018
Windows, Windows software

Microsoft has released the final version of their security software Microsoft Security Essentials on the same day that they have released their latest operating system Windows 7.

Microsoft Security Essentials is a free antivirus software for the Windows operating system that can be downloaded and installed on PCs that pass a genuine advantage check.

Neowin today mentioned that Microsoft is currently accepting beta testers for the Microsoft Security Essentials Ongoing Beta.

Update: You can download Microsoft Security Essentials from Microsoft's website directly if you run Windows 7. This is the link. There is no ongoing beta anymore.

It seems that every Windows users with a valid Windows Live ID can join the beta test which provides access to beta versions of the security software. They need to answer a question about their operating system after log in and can then download the beta of Microsoft Security Essentials for Windows XP, Windows Vista or Windows 7.

Previous installations of Microsoft Security Essentials need to be uninstalled before the beta version can be installed. Microsoft has not released information about the changes in the available beta version. A version check reveals the following information (first final version, then beta)

Microsoft Security Essentials Version: 1.0.1611.0
Antimalware Client Version: 2.0.6212.0
Engine Version: 1.1.5302.0
Antivirus definitions: 1.71.328.0
Antispyware definitions: 1.71.328.0

Microsoft Security Essentials Version: 1.0.1743.0
Antimalware Client Version: 2.0.6212.0
Engine Version: 1.1.5302.0
Antivirus definitions: 1.71.346.0
Antispyware definitions: 1.71.346.0

The only differences are the higher program version and the definition files although those are likely shared between the public version and the beta version.

The downloaded beta of Microsoft Security Essentials will display as version 1.0.1676.0 at the beginning. The strange thing is that the Update check in the program will not raise the version to 1.0.1743.0. To get to version 1.0.1743.0 users need to click on Help > Upgrade Microsoft Security Essentials instead.

Update: Microsoft Security Essentials is still being updated regularly by Microsoft. The company has already announced plans to make the software available for their upcoming operating system Windows 8 as well.

Update 2:  Windows Security Essentials is not available for Windows 8 or 10, but Windows Defender is. It is basically an updated version of Security Essentials that Microsoft built right into the operating system.

You can start the program by tapping on the Windows-key button on your keyboard, and typing Windows Defender.

Join the Microsoft Security Essentials Ongoing Beta
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Join the Microsoft Security Essentials Ongoing Beta
Microsoft is currently accepting beta testers for the Microsoft Security Essentials Ongoing Beta which offers preview versions to users.
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  1. Anonymous said on March 9, 2023 at 1:52 pm

    Does it come back after every “moment” update?

  2. Baloney said on March 9, 2023 at 2:23 pm

    Yeah right.. Like this is going to stop defender from running =) This is comedy gold right here.

  3. Anonymous said on March 9, 2023 at 3:25 pm

    no ‘about the author’ paragraph?

  4. Gregory said on March 9, 2023 at 4:19 pm

    For permanent disable defender is if removed complete from system no just change permission folder.

    Just this is joke.

  5. moi said on March 9, 2023 at 5:57 pm

    simpler, load Autoruns (SysInternals)
    – filter “Defender”
    – untag all entries
    – reboot
    nothing has changed since my 1st modification years ago

  6. John G. said on March 9, 2023 at 6:32 pm

    I wouldn’t disable Defender imho, it has too many hidden roots inside Windows itself. One time I tried to uninstall it using brute force scripts and then the Onedrive feature stopped working definitely. A reinstallation was needed and since those times I prefer to maintain Defender untouched. It’s a better method to install another antivirus and it will disable Defender in a safer and easier mode (e.g., Avast is the best in this way, and also Panda Cloud Free is good too).

    1. Tweakmaster said on September 29, 2023 at 9:57 am

      U are just * [Editor: removed] thats the problem ;p first of all u shall always debloat windows u shall have max 65 services with your drivers for pc and windows own servs. You didnt know what that script did

  7. boris said on March 10, 2023 at 12:19 am

    You can not stop defender from running in background or remove it without some penalty. All you can do is to limit telemetry.

    1. TelV said on March 10, 2023 at 4:52 pm


      It’s probably Smartscreen which is preventing WD from being disabled. Get rid of that and the problem should be solved:

  8. hoho said on March 10, 2023 at 1:47 pm

    Remove Windows and go for Linux.

    1. basingstoke said on March 10, 2023 at 2:51 pm

      Linux sucks dude. Besides it’s not comparable to Windows, these OSes are in different classes entirely.

      1. Derp said on March 10, 2023 at 4:36 pm

        I use Linux as my daily driver. It’s far more stable than Windows. When’s the last time you used Linux, 2010?

      2. Bromosexual said on March 11, 2023 at 2:04 am


        You’re right, dude. Bro, linux is just a bunch of code that starts before the OS, dude. Brobrodude, that shit ain’t even got emojis, dudebrodudeman! Dudebro, it’s no way near as cool as Windows with its hardcoded abilities to make money off the user, bro. Yo brodude man, you’re the coolest dude ever man, bro. Dude.

      3. basingstoke said on August 16, 2023 at 7:20 pm

        Lol what? Windows 7 doesn’t come with any Emojis

  9. TelV said on March 10, 2023 at 4:46 pm

    Download Autoruns and remove the checkmark from Windows Defender. It doesn’t remove it, but it will never run.

  10. Simon said on March 10, 2023 at 8:37 pm

    Just use “Defender Control”:

    Per this video,
    it also works on Windows 11 too…

  11. Someone said on March 10, 2023 at 9:26 pm

    Win Defender, is completly the most succesful free-built in antivirus of Microsoft. Really nice product. Saved my ass a lot of times. Has updated malware database, completly strong defence
    from whatever smart screen disables. Or if you want better and more upgrated (paid) program,
    you can go further. But defender is always on your side.

  12. CalixtoWVR1 said on March 10, 2023 at 10:03 pm

    Why would one disable Windows (or Microsoft) Defender in the first place?. I consider this to be playing with fire big time. Everybody knows that if one is using another A-V, Defender will be disabled on its own and won’t be in one’s way.

  13. Ed D said on March 10, 2023 at 11:09 pm

    Why would I want to disable Windows Defender in the first place? It’s a great anti virus in my opinion. Been using it since Windows 8 and and never had a problem or a virus. Why mess with a good thing, if it ain’t broke don’t fix it.

  14. owl said on August 17, 2023 at 1:57 am

    How a ridiculous article!
    I am thoroughly stunned.

    Why Should You Disable First-Party Windows Defender?
    I can only think that it is “malice or perversely intention (want you to buy a third-party AV where you can expect a back margin)” to guide invalidation without showing the premise.
    No sane company will use third-party closed source programs (such as AV).

    As I thought, “Ghacks Technology News” seems to be coming to downfall.

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