Windows update fails with error code 0x643

Anonymous
2009-10-14T15:22:25+00:00

I have downloaded the recent Microsoft updates and all but one installed successfully.  The failing update was:  Microsoft .NET Framework 1.1 Service Pack 1 Security Update for Windows 2000, Windows XP, Windows Vista, Windows Server 2008, Windows 7, and Windows Server 2008 R2 (KB953297);

with an error code of  0x643.

We tried several times to install it and it keeps failing.  It was originally the 3rd update in the list to install.  After failing the first time, it was the only one we were trying to install.  We tried it after the restart required for the other updates.

Windows for home | Previous Windows versions | Windows update

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  1. Anonymous
    2009-11-08T00:47:41+00:00

    If u find a way to fix it can u e-mail me at <email removed> plz i am getting the same thing.

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  2. Anonymous
    2009-11-06T14:51:23+00:00

    What a complete nightmare! I have wasted hours on this today, did everything I was told in the link by Augustine The Geek, but now the very last thing, reloading .net 3.5 sp1, it is failing to load! I am just so frustrated that MS have the cheek to download something to my computer that doesn't work. Although i have successfully reinstalled .net 2.0, which the failed update/fix relates to, that won't load either. What do i do now? Ran Update and it found nothing more to download.

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  3. Anonymous
    2009-11-06T05:11:01+00:00

    The failing update was:  Microsoft .NET Framework 1.1 Service Pack 1 Security Update for Windows 2000, Windows XP, Windows Vista, Windows Server 2008, Windows 7, and Windows Server 2008 R2 (KB953297);

    with an error code of  0x643.

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  4. Anonymous
    2009-11-02T07:40:03+00:00

    When installing updates using Windows update or Microsoft Update you may receive Error 0x643 or 0x80070643 (23 Oct-09)

    http://support.microsoft.com/kb/976982

    ~Robear Dyer (PA Bear) ~ MS MVP (IE, Mail, Security, Windows & Update Services) since 2002 ~ Disclaimer: MS MVPs neither represent nor work for Microsoft

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  5. Anonymous
    2009-11-02T07:38:32+00:00

    When installing updates using Windows update or Microsoft Update you may receive Error 0x643 or 0x80070643 (23 Oct-09)

    http://support.microsoft.com/kb/976982

    =====================

    Step #1 => Before doing anything else, write down what .NET Framework versions are currently installed:

    How to determine which versions of the .NET Framework are installed and whether service packs have been applied

    http://support.microsoft.com/kb/318785

    Step #2 => Now see Resolution Method 2 in...

    When you try to install an update for the .NET Framework 1.0, 1.1, 2.0, 3.0, or 3.5, you may receive Windows Update error code "0x643" or Windows Installer error code "1603" (ignore the title, if need be)

    http://support.microsoft.com/kb/923100

    After running the appropriate/needed tool, (re)install all .NET Framework versions manually using the download links on the page then run Windows Update manually to install security updates for same.

    NB: If you remove .NET Framework 3.5 SP1 using the tool, reinstalling .NET Framework 3.5 will also install .Net Framework 2.0 SP2 and 3.0 SP2; then Windows Update will offer .NET Framework 3.5 SP1.

    IMPORTANT! => If you remove .NET Framework 3.5 SP1, reinstall your .NET Framework versions in the following order:

        1. .Net Framework 3.5, then...

        2. .Net Framework 1.1, then...

        3. .Net Framework 1.1 SP1

    NB: KB923100 references this page: http://blogs.msdn.com/astebner/archive/2006/05/30/611355.aspx.  Please read ALL of it as well as the related page http://blogs.msdn.com/astebner/pages/8904493.aspx before using the .NET Framework Cleanup Tool.

    Step #3 => Check-in at Windows Update and install any critical security updates offered.

    ~Robear Dyer (PA Bear) ~ MS MVP (IE, Mail, Security, Windows & Update Services) since 2002 ~ Disclaimer: MS MVPs neither represent nor work for Microsoft

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