Windows Vista - Error Code: Windows Update encountered an unknown error

When you use Windows Update on my computer the program informs me that there is an important update for my computer.  After clicking on the "install updates" button
After that, he says:
Update 1 of 1
Microsoft. NET Framework 1.1 Service Pack 1 update for Windows.

Then he informed me that the updates were not installed and comes up with:

Update code 643 Windows has encountered an unknown error.

I tried to manually install Service Pack 2 on the microsoft site as suggested in a convenience store for the errors that occur during updates, but this does not appear to have solved the problem.

You can provide any assistance would be greatly appreciated.

Step #1 => foremost, note what version of .NET Framework is installed:

How to determine what version of the .NET Framework is installed and determine whether the service packs have been applied
http://msdn.Microsoft.com/en-us/KB/kb00318785.aspx

Step #2-online now see resolution method 2 in this related KB article: http://support.microsoft.com/kb/923100

After running the cleaning of .NET Framework (not the Windows Installer Cleanup utility) tool, reinstall all the versions of the .NET Framework (but the ones you noted in #1 above) manually using the download links on the page, and then run Windows Update manually install security updates for same.

NB: If you remove the .NET Framework 3.5 (SP1) by using the tool, reinstall .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 the .NET Framework 3.5 (SP1), reinstall your version of .NET Framework in the following order:

1. the .net framework 3.5, then...
2 .net framework 1.1, then...
3 .net framework 1.1 SP1

NB: KB923100 makes reference to this page: http://blogs.msdn.com/astebner/archive/2006/05/30/611355.aspx.  Please read ALL as well as the related http://blogs.msdn.com/astebner/pages/8904493.aspx before using the .NET Framework cleanup tool.

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


PS: I think you have worse problems, Phil: http://social.answers.microsoft.com/Forums/en-US/vistawu/thread/856d02a2-837c-4e10-ad51-82039bf5c166
~ Robear Dyer (PA Bear) ~ MS MVP (that is to say, mail, security, Windows & Update Services) since 2002 ~ WARNING: MS MVPs represent or work for Microsoft

Tags: Windows

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