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Hello, I've been having trouble trying to do an update from Windows Update... But it fails everytime.

This has been happening for... possibly months and I've been ignoring it but I figured I should try and fix it...

Security Update for Microsoft .NET Framework 1.1 SP1 on Windows XP, Windows Vista, and Windows Server 2008 x86 (KB2833941)

Installation date: ‎4/‎10/‎2013 1:15 AM

Installation status: Failed

Error details: Code 643

Update type: Important

A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system.

More information:


Help and Support:


I have Windows Vista, 32-bit, Avast Free.

Let me know if I have to provide more information...


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  • Root Admin

Generally speaking removing ALL the .NET installers and clearing out some files and folders and resetting some permissions there is no easy way to fix this.  Microsoft has a Fixit for it but from what I gather most users say it does not work for them.

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