Microsoft Security Essentials (64-bit) 4.6.305.0

3.9 out of 5 stars 3.9 (54 votes)

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Windows 7/Vista/XP / Freeware / 14,694 downloads

Microsoft Security Essentials provides real-time protection for your home PC that guards against viruses, spyware, and other malicious software. It is a free download from Microsoft that is simple to install, easy to use, and always kept up to date so you can be assured your PC is protected by the latest technology. It’s easy to tell if your PC is secure — when you’re green, you’re good. It’s that simple.

Microsoft Security Essentials runs quietly and efficiently in the background so that you are free to use your Windows-based PC the way you want—without interruptions or long computer wait times.

Reviews of Microsoft Security Essentials (64-bit)

  1. 2 out of 5 stars
    Blaxima

    Reviewing 4.6.305.0 (Nov 17, 2014)

    Poor detection and removal. Slows your computer down far too much as it scans every program you open

  2. 1 out of 5 stars
    nilst2006

    Reviewing 4.6.0302.0 Pre-Release (Aug 23, 2014)

    Poor detection of malware/viruses/trojans !

  3. 2 out of 5 stars
    Music4Ever

    Reviewing 4.4.207.0 Pre-Release (Sep 10, 2013)

    MS came 17th out of 18 AV's on 'AV Comparative' (March - June 2013) tests - Enough said really

  4. 3 out of 5 stars
    Vivek Kowshik

    Reviewing 4.2.223.0 (Feb 21, 2013)

    MSE today lags behind almost every other AV in virus detection, as mentioned by some of the guys here. It also requires manual updation, as the automatic update never works. Microsoft claims that the AV tests are not realistic, as the tests use sample viruses, which have infected only a very small fraction of the total number of PCs running Windows. So it is their word against yours. Apparently MS is on a self destructive path, as you can see from the quality of their AV product and the terms they are imposing on potential users of MS office today.

    My personal suggestion is to use AVG or Avast if you need free protection, and have a fast enough PC/laptop with Core i3 or better. I still use MSE as my primary AV, as I find substantial slowing down of my old laptop with either of the other AVs. I also have Comodo firewall installed, with Defence+ turned ON. This gives me additional protection of sand-boxing, as well as a secondary AV (Comodo AV detection is built in), and there has been no infection in the last 4 years that I am using my Pentium based laptop with Win7. In addition I run Malwarebytes scan every week to double check on these two. Three stars only because it does not leave my laptop panting for breath.

  5. 5 out of 5 stars
    OldGeek

    Reviewing 4.2.223.0 (Feb 20, 2013)

    I wasn't sure whether to use this or not so I gave it a test drive on one of my laptops and I must say I was very impressed. I experienced 0 slow downs on the laptop. I can only assume it does what it's supposed to do because I don't usually get infections on my PC's. So far so good, it seems to be very seamless.

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