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

Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

0 comments

156 answers

Sort by: Oldest
Most helpful Newest Oldest
  1. Anonymous
    2009-10-21T10:21:33+00:00

    Are you sure it's not "643", which appears to be common at the moment

    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"

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

    TaurArian [MVP] 2005-2010 - Update Services

    Was this answer helpful?

    0 comments
  2. Anonymous
    2009-10-22T06:56:46+00:00

    Was this answer helpful?

    0 comments
  3. Anonymous
    2009-10-22T07:47:11+00:00

    Hi Dan,

    I am not used to security bulletins from Microsoft. I understand that they have corrected the vulnerability of updated KB 974417 BY mso9-061. But I did not understand what i have to do on my machine to be able to successfull install KB 974417. Is there something that I have to download (KB 974378) or something which will let me install this update. If yes, please advice/provide link of where can I download that.

    MS09-061 looked like a text written to read but nothing to install (according tome)!.

    Please help.

    Regards,

    Pratik

    Was this answer helpful?

    0 comments
  4. Anonymous
    2009-10-27T13:11:50+00:00

    im trying to update my windows with KB953297, but it keeps on failing. i tried 6 times to install it but to no avail. need help on this one.

    Was this answer helpful?

    0 comments
  5. Anonymous
    2009-10-27T14:10:56+00:00

    Hello Razzgriz,

    Thank you for using Microsoft Answers Forums.

    Solution for code 643:

    This is a common issue with the .NET Framework Updates.

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

    Follow the steps from the above web link to resolve the issue.

    That should do the tirck for you.

    Thank you.

    Regards,

    Augustine.

    UDAY$012 Please let me know whether the solution worked or not, I appreciate and value your feedback. UDAY KUMAR

    Was this answer helpful?

    0 comments