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
    2010-06-13T13:19:41+00:00

    Hi, can you tell me what UAC stand for?

    Greetings Dreb

    User Account Control.  Here's more information about it if you're interested:http://technet.microsoft.com/en-us/library/cc709691(WS.10).aspx.

    I hope this helps.

    Good luck!

    Lorien - MCSE/MCSA/Network+/A+ --- If this post helps to resolve your issue, please click the "Mark as Answer" or "Helpful" button at the top of this message. By marking a post as Answered, or Helpful you help others find the answer faster.

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  2. Anonymous
    2010-06-13T12:40:54+00:00

    Hi, can you tell me what UAC stand for?

    Greetings Dreb

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  3. Anonymous
    2010-06-12T20:44:18+00:00

    I'm also having problems installing the recent Windows update as I keep getting error Ox643 telling me that Microsoft .NET Framework (KB979906) wont install. Seems there's a problem here as I see I'm not the only one.

    Sheba4

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  4. Anonymous
    2010-06-11T02:39:19+00:00

    Hi, I also had a major problem installing KB982536 (MS .NET Framework 3.5 Sp1, Windows Vista Sp2, Windows Server 2008). I tried uninstalling all .NET programs, rebooted and reinstalled .NET 3.5 and .NET Framework 4.0, rebooted and still wouldn't install. Used Cleanup Utility Tool. Didn't help. Eventually I turned-off UAC, rebooted and successfully installed the update. Turned UAC back on and rebooted. Hope this info is helpful.

    Regards,

    Glen 

    newbee trying to learn something new

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  5. Anonymous
    2010-05-05T15:33:38+00:00

    Our site was having the same issue for 100+ computers using Windows Update Server. All were XP or 2003. We resolved it by doing the following via a script:

    1. Uninstall KB976569 - No Reboot Required
    2. Install KB974417 - No Reboot Required
    3. Install KB976569 - No Reboot Required

    Apparently KB974417 needs to be installed before KB976569

    This worked for me as well. Thanks Brainstormer!

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