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Thread: Windows Update doesn't work - error 80070643

  1. #1
    Join Date
    Dec 2007
    Posts
    2

    Windows Update doesn't work - error 80070643

    I have 32-bit Windows Vista Home Premium, and I've tried updating it with the
    Windows Update. Each time I've gotten an error code 80070643. I found this
    article (http://support.microsoft.com/default.aspx/kb/903772), but the odd
    thing is that I do not have Microsoft Office on my computer.

    Windows Update also says that I should update Windows Update itself.
    However, it doesn't seem to have any effects, and WindowsUpdate.log file has
    several errors.

    Any ideas?

  2. #2
    Andre Da Costa[ActiveWin] Guest

    Re: Windows Update doesn't work - error 80070643

    Rename the SoftwareDistribution folder. (Because of possible folder
    corruption or other errors.)
    Click Start, Choose Run.
    In the Run box, type services.msc.
    Click OK.
    Right-click the Automatic Updates service.
    Click Stop.
    Stopping the service will take a moment.

    Rename the "SoftwareDistribution" folder:
    a. Click Start, click Run, type %systemroot%, and then click OK.
    b. Right-click the SoftwareDistribution folder, and then click Rename.
    c. Type SoftwareDistribution.old, and then press ENTER to rename this
    folder.
    Create a new folder called "SoftwareDistribution"
    Click Start. Choose Run.
    In the Run box, type services.msc.
    Click OK.
    Right-click the Automatic Updates service.
    Click Start.
    Starting the service will take a moment.
    Rerun Windows Update.

  3. #3
    Join Date
    Dec 2007
    Posts
    2
    I did according to your instructions, but the situation didn't change. Apparently Windows Update seems to be unable to update itself.

    Could there be folder/file corruption in any other folders? Or does Windows Update only utilize the Software Distribution folder?

  4. #4
    Peter Foldes Guest

    Re: Windows Update doesn't work - error 80070643

    If it is windows vista and you are seeing this error when trying to install updates,
    please try the following:-

    1.. Open an Administrator command prompt by right clicking on Start -> All Programs ->
    Accessories -> Command Prompt and selecting "Run as Administrator" and clicking "Allow"
    for the elevation prompt
    2.. In the command prompt, type the command below fsutil resource setautoreset true C:\
    (This assumes that C: is the drive in which Vista is installed. If it is installed on
    another drive like D:, please change the drive letter appropriately)
    3.. Reboot the machine
    This is the resolution only for 80070643 error while installing updates on Vista. This
    doesn't apply for other OS like Windows XP SP2 etc

  5. #5
    Join Date
    Aug 2009
    Posts
    1

    Re: Windows Update doesn't work - error 80070643

    Wow i had troubles with windows update, my error code wasn't even 80070643, it was some other one. I tried your method or renaming and it worked, just like brand new again ...thanks...

  6. #6
    Join Date
    Dec 2009
    Posts
    1
    Kindly download the file manually:

    http://support.microsoft.com/kb/949104


    To install Windows Update Agent:

    - Save file to C:\
    - Start > Run > CMD
    - Cd c:\
    - WindowsUpdateAgent30-x86 /wuforce
    - Replace WindowsUpdateAgent30-x86 with relevant file name according to the version that you downloaded.

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