OneCare Firewall blocks Windows Live Messenger Service RRS feed

  • Question

  • After installing Windows Live One Care I get the following error when attempting to logon to my Windows Live Messenger V8.1:

    We were unable to sign you into Windows Live Messenger.  Windows Live Messenger has made several failed attempts to sign you in.  Your firewall may be blocking Windows Live Messenger from connecting to the service.  Error Code 80048820  Extended error code 8004816

    If I select the troubleshoot button "Key Ports" has a yellow triangle with a !  Then you receive "Failed to connect to the service"

    My password works fine when logging into my hotmail.com ID but using the same login and password in Messenger produces the above error.  This became a problem only after installing OneCare.

    Windows Live Help - "Error 80048820: You can't sign in to Windows Live Messenger"

    Suggestion that seem to have resolved this:

    1. Add MSNmsgr.exe to your firewall program allow list
    2. Change Internet Explorer TOOLS, OPTIONS, Connections Tab, LAN Settings, Automatically detect settings.
    3. On the Internet Explorer Internet Options, Advanced tab, Security, Uncheck "Check for server certificate revocation, also check "Use 2.0" and "Use SSL 3.0", Click OK Close reopen Internet Explorer.
    Friday, February 27, 2009 3:27 AM


  • OneCare should not normally block Windows Live Messenger. Try turning off the OneCare firewall. If Messenger connects fine with the firewall off, then contact OneCare support.

    How to reach support (FAQ) - http://social.microsoft.com/Forums/en-US/onecareinstallandactivate/thread/30400b52-7f26-4ba0-bc18-17e305329d90

    If it still doesn't connect, then I recommend pursuing this with Messenger support:


    Go to http://support.live.com/ and sign in with a LiveID

    Click on the Windows Live service or product you need help with.

    If you are not presented with an email support form, but are instead redirected to help.live.com for that service/product, in the page that opens from http://help.live.com/ select any topic on the left hand side or search for a question in the search box.

    The results of your search or the clicked topic appears in the right hand frame, along with a tiny link in the lower right hand corner – “Get more help.”

    Click that tiny link and you will get to a page with a link “Contact support”

    Click that link and you will be presented with the email support form to fill out. Provide as much detail as possible and you should get a response from support within 24 hours.

    Help topics at http://help.live.com/



    Microsoft MVP Windows Live / Windows Live OneCare & Live Mesh Forum Moderator
    Friday, February 27, 2009 4:49 PM