Poor browser performance after (MS14-52) KB2976627 and (MS14-51) KB2977629 install. RRS feed

  • Question

  • Hello,

    I work for a large enterprise and we have found that after installing (MS14-52) KB2976627 and (MS14-51) KB2977629, Internet Explorer performance has become unacceptably slow for our end users.

    When testing sites such as,, Huffington Post, it is taking the browser 40+ seconds to load the site.  When you use Chrome or Firefox on the same machine all of the above sites load in less then 10 seconds.  We were testing with IE8 and IE9,  we thought it might be related to the nature of the websites so we have upgraded a test machine to IE11.

    Preformance with IE11 is better, but I would still say it is not where close to Chome/Firefox.

    Upon removing these two security updates for IE we found the websites mentioned above to load around the sametime as Chrome/Firefox.

    I know there was a known issue with the August IE Update that was suppose to be fixed in the September Patch.

    Unfortunately this appears not to be the case.  Is Microsoft looking at this issue at all?  Is there some better place to report this issue?

    I figured I would check here first to see if the IE team is seeing this issue with other users also.

    If there are any suggestions it would be much appreciated.

    We are seeing the issue also appear with running IE with extensions off so that somewhat rules out add-ons.

    Thanks in advance for any assistance.

    Friday, September 26, 2014 11:05 AM


  • Hi,

    What's your current system? Actuall, I made a test in Windows 8.1 update 1 Enterprise X64, IE 11 working fine after both these two updates installed. These website you lists could be opened smoothly.

    For your problem, please make sure all Windows updates installed, If problem persists, please try to open IE with no adds-on for test.

    Open IE with no adds-on:

    Open run, then type iexplore -extoff

    Roger Lu
    TechNet Community Support

    Monday, September 29, 2014 8:20 AM