New v2 of Microsoft Security Essentials brings new features, makes improvements

Reviewed by dotTech, and used by many, Microsoft Security Essentials is a terrific product created by Microsoft to help address the ever growing malware issue. Being fairly new, until yesterday MSE was only v1; now, Microsoft has released v2 of MSE, adding few features and making improvements.

Although Microsoft seems to have kept fairly quiet about the update – I cannot even find an official announcement nor an official changelog – I have been able to successfully update to v2 of MSE and can verify that it has indeed been released.

While there seems to be no official changelog available, the Help file of MSE v2 lists the following changes made in v2:

This version of Microsoft® Security Essentials includes the following new features and enhancements to better help protect your computer from threats:

  • Windows Firewall integration. Security Essentials setup enables you to turn on or off Windows Firewall.
  • Network Inspection System. This feature enhances real-time protection by inspecting network traffic to help proactively block exploitation of known network-based vulnerabilities.
  • New and improved protection engine. The updated engine offers enhanced detection and cleanup capabilities with better performance.

These features are described in more detail in the following sections.

  • Windows Firewall integration
    • Windows Firewall can help prevent attackers or malicious software from gaining access to your computer through the Internet or a network. Now when you install Security Essentials, the installation wizard verifies that Windows Firewall is turned on. If you have intentionally turned off Windows Firewall, you can avoid turning it on by clearing a check box. You can change your Windows Firewall settings at any time via the System and Security settings in Control Panel.
  • Network Inspection System
    • Attackers are increasingly carrying out network-based attacks against exposed vulnerabilities before software vendors can develop and distribute security updates. Studies of vulnerabilities show that it can take a month or longer from the time of an initial attack report before a suitable security update is developed, tested, and released. This gap in protection leaves many computers vulnerable to attacks and exploitation for a substantial period of time. Network Inspection System works with real-time protection to better protect you against network-based attacks by greatly reducing the timespan between vulnerability disclosures and update deployment from weeks to a few hours.
  • Award-winning protection engine
    • Under the hood of Security Essentials is its award-winning protection engine that is updated regularly. The engine is backed by a team of antimalware researchers from the Microsoft Malware Protection Center, providing responses to the latest malware threats 24 hours a day.

Furthermore, although the Help file does not state it, it looks like MSE now also includes a “behavior monitor” (presumably a behavior blocker):

Even at v1 MSE performed extremely well as an anti-malware program; without a doubt v2 makes it that much better. It will definitely be an interesting comparison pitting MSE v2 against avast!, AVG, and Avira the next time I update the comparison article.

It seems like at this time there is no update of MSE available from MSE itself or Windows Update; if you already have MSE installed you need to download v2 manually and manually upgrade. You can download MSE v2 from the following links:

Version reviewed: v2.0.657.0

Supported OS: Windows XP/Vista/Win7

Download size: 7.5-9.5 MB, depending on if you get 32-bit or 64-bit version

Microsoft Security Essentials homepage

[Direct download – 32-bit]

[Direct download – 64-bit]

Thanks acr, Troll, and Samuel!

Related Posts

  • Tony n Az

    only MSE comes from the company which makes windows!

    The same OS that is riddled with security vulnerabilities hackers frequently exploit. That doesn’t bother you?

  • JoeB

    @Rob: Avira is rubbish, NOD32 x64 is best in it’s class… small memory imprint, fast, best virus definition database and best virus kill rate.

    MSE v2.0 is pretty good, can’t complain, it’s free and does the job well.

  • David Roper

    @Ashraf: Well, after trying to live without AVG and using only MSE2 for two days, I am back to AVG. Maybe something was set wrong by me with MSE2 but booting up my Win7 home 2GB laptop took too long, maybe three minutes.

    Removed it and went back to AVG, removed MSE2 and all’s well now, faster boot up and all. 2 mins.

    just saying…

  • Jacal

    On there are some updated recommendations for configuring the new real-time protection options in MSE. On the first page at the moment.

    Have a nice day,

  • Clodmore

    @Johnd: You can set it so it will ask on everything. Sorry if I didn’t make that clear.

  • janetb


    Click on the blue “Reply to comment” at the lower left of the comment to which you would like to reply….:-)….

  • Johnd

    BTW how do people get others names to appear bold and blue when they are replying to someone?

  • Johnd

    @Clodmore: Thanks. However, I like my antivirus/malware program to ask me on everything with an ignore or quarantine/delete at time of finding it. I don’t like anything automatic. I am unsure on your answer if MSE2 does this or does it take action based on how MSE2 perceives the risk to be?


  • Clodmore

    @Johnd: You can tell it to automatically “Delete”, “Quarantine”, or as you want, “Recommend Action”. For two lower level risks, you can also tell it to “allow” the program/risk. FWIW, it has four threat/alert levels: Severe, High, Medium and Low. The “Allow” is for the bottom two lesser threat levels, of course.

  • Johnd

    Does MSE 2 automatically delete files when it has a suspicious one or does it give you a choice of what to do? I like a program that gives me an option of what to do?


  • Ashraf

    @Giovanni: I think I have already addressed your concerns in – drum roll please – =P

  • Giovanni

    hmmm if I’m not wrong MSE doesn’t provide any EMAIL and antiPHISHING protection unlike AVAST FREE EDITION and its detection rate is much lower when compared to both AVIRA and AVAST….right?

    So everything considered, I think that MSE could be good as ON DEMAND MALWARE SCANNER only along with EMSISOFT ANTIMALWARE.

    What do you make of it, ASHRAF?

  • Dan


    Thanks for that, Matt. I left OA running as is and didn’t bother with the Windows firewall at all..been like that since I installed the MSE upgrade..but I did follow the suggestions made by “acr” above and my system is now running fine..better, in fact, than it was before!

    Overall the speed has increased and it’s nearly like it was when I first bought it a few couple of years ago!

    Overall..I’m happy the ways things are going right hopefully there shouldn’t be anymore issues, as I turned off/stopped SAS from auto starting at well as tell everything else to ignore each other..and the system is now flying!

    Thanks once again for the input.


  • @Ashraf, @janetb: Not sure why it’s such a secret. It’s clearly not a beta since I was running the beta…I’ll see what I can dig up though.

  • Matt

    Online Armour ++ also has an antivirus element, so that could be conflicting if it’s not turned off (for on-access).

    Another point, MSE is not a firewall – it has an on/off for the Windows firewall, and some network inspection, but I’d be inclined to pair MSE with a much more controllable firewall than the basic Windows one

  • janetb

    Why on earth is MS keeping v.2 such a secret??? Is it perhaps a beta verson?
    I’ll keep my Avira until you do a comparison review…..:-)…..

  • Dan


    Thanks, acr, for the welcomed advice. I never thought of excluding each of them from each other, like you suggested..that’s a real good idea..and an obvious one I should have thought of myself. Even that alone might sort the issues out I am having. Guess time will tell on that front.

    I’ll knock SAS off from booting at startup and see how that goes, following your advice. I usually only run manual scans with it it’s using up system resources needlessly anyhow..

    I’ll post again on this just to update on how this transpires for me in a few days..for anyone who is interested.

    My thanks again, for the quick reply and advice.


  • acr

    I would just use SAS as an on demand scanner. It is fine in that role. But the real time protection is not very good at all. One thing about MSE, even this latest version, is that it constantly scans archive files which can cause a bit of a system hit. And from what I understand, having the “scan archive files” unchecked under the settings tab just applies to on demand scans.

    If you’ve not done so yet, you may also want to make sure that MSE, OA and WinPatrol are all excluded from each other – so that MSE isn’t constantly scanning the OA HIPS and WinPatrol protection & vice versa. Also reboot and let your computer run a bit – maybe a day or two – do a full system scan with MSE – then see if the problems you have continue. If so, maybe check out some other av’s at that point.

  • Dan

    OK.. I upgraded without any problems or issues and have been keeping an eye on things for a good few hours now..and all seems fine, aside from from system apparently becoming somewhat sluggish, with program windows becoming very slow to refresh and the pointer acting a little if the PC is about to freeze up.

    Also, I noticed while playing music files or videos/mpegs..there is a kind of intermittent “warble ” on the audio that wasn’t there before..again, as if it is about to stall or crash due to the system being overloaded.

    Up to now I have had no problems running MSE alongside the other programs I have, so I am guessing this new upgrade has added something to the mix that is resulting in these issues “under the hood”. So..I want to ask anyone up of these things what you think I should do?

    Currently I have the following running at startup..

    b)..Online Armour ++
    c)..SUPERAntiSpyware Pro
    d)..WinPatrol Pro

    To date, this combo has been great..but in light of what’s now happening, which..if you guys think I should or can do without?

    Basically, I would like to know if you think MSE is REALLY good enough to trust as my main firewall and first line defense..or should I keep some or all of the others running on my system at the same time. I have become used to the popup windows of OA and the way I am warned if and when anything tries to do something it should..or simply run without my knowing..a feature I think MSE lacks…so I am finding it hard to let go of that and trust MSE 100%.

    Any feedback or ideas will be very much appreciated.

    Thanks in advance.


  • David Roper

    @David Roper: Uninstalled AVG. Now my PC is noticeably faster than when I ran both. Thanks.

    They Were fighting each other. I got notices they were stepping on each others’s toes.

  • Phil K

    @Phil K:
    Oh and I’m happy to continue, myself Ash !

  • Phil K

    Cheers, Ash

  • Ashraf

    @David Roper: Live protection for both at the same time? Yes you can. But should you? No… it will probably slow your computer down.

  • David Roper

    Can I run AVG and MSE at the same time or must I choose which girl to dance with?

  • Ashraf

    @Samuel: But isn’t it odd Microsoft has released v2 so quietly?

    @Everyone: You are welcome! (Even you George.)

  • Ashraf

    @George: I am sorry to see you go; aside from the MSE fiasco I do hope you enjoyed your stay at our little corner of the Internet.

  • Ashraf

    @George: What can I say; I get off on making people screw up their computers.

    On a serious note, I was able to upgrade without any problems and as you can see from the above comments others were also. Sorry it wasn’t the same for you.

  • George

    and I’ve unsubscribed from dot-net (under an alias) – have fun!!!!!!!!

  • George

    The install from 1 to 2 did not work. Now my system is running without an anti-virus. I’ve tried several things to back it off, based on the error code, but nothing has worked. Even system restores didn’t work. I had to resort to Acronis and restoring a backup of my C: drive.

    Thanks again for yet another WONDERFUL download.

  • Clodmore

    Thanks, Ashraf, for the heads up. I probably would have never known about it otherwise.

    I upgraded from Version 1 to 2 without any problems. I don’t know which anti-virus program is the best, but Security Essentials seems to work fine for my needs. I really don’t go to any “dangerous” sites or download files from unknown sites, but I suppose things could happen. MSE seems to meet my needs.

  • Dennis F.

    Thanks Ashraf. I built this machine new 6 months ago and MS Essentials has protected it well ever since. Glad to see they finally have an upgrade. MS released 12 updates the other night, along with one from ATI for the Radeon 5770. System is still stable and the 5770 is running 3 degrees cooler. I love 2010.

  • Apparently you found out about the lack of an official change log.
    While it would be nice if it auto updated the program, very few anti-malawares do. (Really annoying but true).

  • Dan

    Thanks, Bill and Ashraf, for the quick reply on this..much appreciated!


  • Ashraf

    @Dan: Download the installer and run it – you will have an option to upgrade. So, essentially just “install over”.

  • Rob

    Tried it, tends to slow things down. I think I am going to stick with Avira. Much liter on my system
    For some reason I feel naked with out Avira running in the background. lol

  • Bill Scott


    It will update version 1 to version 2. No need to uninstall.

  • Dan

    This might be a stupid question, but should we remove/uninstall v.1 before we install v.2..or just install over the existing version?


  • mukhi

    awesome news, time to switch to MSE…

    how good MSE is in blocking autorun.inf? avast! does a nice job and saved me several times. probably the only reason why i didn’t switch from avast! to MSE.

    avast! vs. MSE:

    price: both free
    footprint: comparable
    protection: comparable
    speed of scan: comparable
    reliability: comparable, however, only MSE comes from the company which makes windows!