Definition Update for Microsoft Security Essentials - KB2310138 (Definition 1.131.445.0)


  • I have been unable to update Security Essentials for over a week through Windows Update or with Microsoft Security Essentials' update tab. I have applied all of the recommended fixes and none of them work. This has never happened before except with an occassional failure usually due to an Internet connection problem which is usually fixed by unplugging my cable router and wireless router and plugging them back in. Windows Update and Microsoft Security Essentials are essentially useless without being updated daily with the latest definitions etc. and I'd really prefer someone figuring out what the actual problem is within both of these programs. There is nothing wrong with my Internet connectivity, everything else is still working as I am accustommed. What seems like a minor problem to Microsoft is a serious issue to me and I'd like some attention as I am sure I am not the only customer that is upset with Microsoft, once again I might add. Fix it and report back to me as soon as you find the cause of this FAILURE and I'll thank you when all is well. Sincerely,


    Thursday, July 26, 2012 5:53 PM


All replies

  • Since this is a Microsoft Security Essentials issue, I suggest you to ask your question in the Virus and Malware Answers Forum at

    You can download the latest definitions for Microsoft Security Essentials from and install it manually.


    Luigi Bruno

    Thursday, July 26, 2012 5:59 PM
  • Hi,

    If you encounter problems while trying to install definition updates for Microsoft Security Essentials, you can download and install the latest Microsoft Security Essentials definition updates for computers.

    Install the latest Microsoft Security Essentials definition updates

    Alex Zhao

    TechNet Community Support

    Friday, July 27, 2012 8:32 AM
  • Wish we were able to "down-vote" answers...
    Tuesday, December 18, 2012 2:20 PM
  • BikerCrash,

    I do not have an answer for you, nor am I a MS employee. My apologies.  However, after reading your question, I have a question for you if don't mind?

    Your paragraph, in the center, reads:  "Windows Update and MS Security Essentials are essentially useless without being updated DAILY with the latest definitions etc. and......."  "Daily," is that a fact?  I have been doing it and thought something was a miss with my system.  .347k almost daily as update material with the same ID #, KB2310138?  I missed reading this was required, or a new thing, etc... I thought Tuesdays were it?  Wondering...

    Monday, January 06, 2014 8:20 PM