How to download and install Microsoft Security Essentials offline updates

Microsoft Security Essentials is a much better choice among freeware AV packages. You would have noticed, that it updates its virus definitions on first launch and it could be a bit problem on a PC, which is not connected to Internet. But you can download its offline updates appropriate for your version of Windows.

You can download the Microsoft Security Essentials from here. Microsoft Security Essentials v2.1

How To:

1. Download the latest virus and anti-malware definition update files.

2. The update files are executable files and can be installed easily without much interaction.

To verify the status MSE: Open Microsoft Security Essentials, click Update, and then see the virus and anti-malware definitions status.

  • Sir Chris

    why is it that the size of the definition update of MSE is getting bigger?

  • disqus_IfmVoXF28Y

    I am using windows 7 ultimate.I downloaded and installed microsoft security essential succesfully.But it is not taking update.How to solve it?

  • Ashish Tondak

    thanks it is commendable antivirus software by microsoft.

  • Aronnie77


  • Kashaan

    I like it most because it is a power full anti virus. Thanks Microsoft

  • American_nice_2006

    thank u

  • lvg21

    I am having the same problems, I am using Windows 7 64bit, so I downloaded the 64bit MSE version. When I tried to run it, it said mseinstall.exe is not a valid win32 application. I then downloaded the MSE 32 bit just in case, and it tells me to download the 64bit version when I try to run it…


  • aashu

    yaar..i downloaded it and when i ran it as an adminstrator i knew the file is corrupted seriously …

  • tonzer

    i am lookin’ for offline update pack for all mse updates since 1-1-2011 to 1-1-2012 .. any help ?

  • Ko Hnin

    I like Microsoft security essential because it is the best Antivirus software:-)

  • shaahin

    I downloaded updates from the link you gave but when i run the file nothing happens
    my MSE still needs to be updated
    what should i do?

    • Ko Hnin

      Hi friend!
      You should reinstall the latest free version of MSE and then Update Offline or online. Thus, you will okay:-)

  • syed rasheed

    i need to download mse offline. how could i ? ? ? help me with this!

  • mark

    that’s weird.. you said you have a 64bit OS but the error message looks for a valid 32bit app? hmmn.. is it possible to install a 32bit mse in a 64bit OS, then running it under compatibility options?

    for me, i’ll download the latest mse 64bit installer, uninstall the one presently installed, then install the one that’s just downloaded earlier..

    then: <<<64 bit manual update

  • Azhagu Sundhar

    I am using Windows 7 Home basic (64-bit) version OS. I installed Microsoft Security Essential Update. but microsoft security offline update(mpam-fe) is running but not updating microsoft security essential. if i install(mpam-fex64) it shows mpam-fex64.exe is not valid win32 application. i need help to update

    • Keyurpatel

      download mpam-fex64 for your licence version of window7 ….the install mpam

    • Azhagu Sundhar

      but its not working yaar..
      it shows mpam-fex64.exe is not valid win32 application.

    • Rahul

      u have original windows??????

    • Azhagu Sundhar

      yes… Soni Vaio E series… Windows 7 Home basic (64-bit) version OS.

  • NeedHelp

    uh….I can use Internet only at a Cafe but i want to update my desktop can someone plz help me with the patching

    • NeedMoreHelp

      PLZZzzzzzzzzzzzzzzzzzzzzz HELP!!!!

  • Hello


  • Realdemons

    It Really Great!

  • mse

    microsoft security essentials is a good antivirus and free ! the heuristic is good

  • Admin

    What happned? Just download update package by clicking above mention links and install on your PC.

  • Nisaar

    Im also having the same problem.. i want to download latest defination updates.. so i clicked the link as you mentioned from browsing center, But the page is not opening.. please help me to download

  • Admin

    If you are using 64bit version of Windows, then you must downloa 64bit version of MSE and its update. So please confirm your Windows version.