Windows XP SP3. Microsoft .NET Framework 1.1 Service Pack 1 Security Update fails to install repeatedy.
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I don't think you'll find a simple solution for this problem (unless you consider "hiding" the update or formatting your HDD & doing a clean install of WinXP to be simple solutions).
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
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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 (but only the ones you wrote down in #1 above) 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
~Robear Dyer (PA Bear)
Microsoft MVP (Windows Client) since October 2002
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