Windows 8 and 8.1 Forums


Windows Defender update error code 0x80004004

  1. #1


    Posts : 2
    win8.1

    Windows Defender update error code 0x80004004


    i noticed from last few days i m not able to update my win defender on my win 8.1
    some kind of error message shows
    error code 0x80004004
    tried running sfc scan it find files that cant be fixed by it

      My System SpecsSystem Spec

  2. #2


    Posts : 2
    win8.1


    anyone can help....
      My System SpecsSystem Spec

  3. #3


    Harrisonburg, Va.
    Posts : 10,488
    Windows 8.1.1 Pro with Media Center


    Run---

    Dism /Online /Cleanup-Image /RestoreHealth

    in admin cmd prompt & then---

    sfc /scannow
      My System SpecsSystem Spec

  4. #4


    I've also been getting the same error code with Defender, so I tried what you suggested. Upon completion of the scan through sfc/scannow, Command Prompt game me a message saying that it'd found some corrupt files but that it was unable to fix some of them. What do I do now?

    By the way, I also get Error Code 0x80040154 when I try to do an Elevated activation of Windows Defender with Admin privileges. It also gives me an error message saying, "Class not registered".

    Also, even though Defender's Real-time protection and Firewall are on, and it's showing that it's up-to-date (unless I attempt definition updates through Defender rather than Windows Update), Action Center still has two messages all the time right now, talking about antivirus and antispyware software. How do I fix these problems?
      My System SpecsSystem Spec

Windows Defender update error code 0x80004004
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