Vista error codes 643 and 646

Hi there,

the error codes that you have mention is related to windows update of Microsoft .net framework.

To troubleshoot this issue, I suggest we first perform these steps:

Step 1: Download Microsoft Windows Installer CleanUp utility
====================================
1. Visit:
http://download.microsoft.com/downlo...BD/msicuu2.exe
2. Save the file to your computer.
3. Right click "msicuu2.exe", click "Run as administrator" and follow the
wizard to install this tool on your computer.

Step 2: Remove .NET Framework
========================
1. Click Start ->All Programs->Windows Installer Clean Up, click Allow.
2. See if you can find .Net Framework software. If so, remove them.

After that, please restart the computer and perform the following
suggestions to reinstall .NET framework 1.1 and the updates for it.

Step 3: Install .NET Framework 1.1 Redistributable Package and related updates
==================================================
1. Please download the Microsoft .NET Framework Version 1.1 Redistributable
Package from the following link and save it to the C drive (C:\)

1) Microsoft .NET Framework Version 1.1 Redistributable Package

http://download.microsoft.com/downlo...6/dotnetfx.exe

2) Microsoft .NET Framework 1.1 Service Pack 1

http://download.microsoft.com/downlo...867460-X86.exe

3) Security Update for Microsoft .NET Framework, Version 1.1 Service Pack 1
(KB928366)

http://www.download.windowsupdate.co...d81a178b15.exe

4) .NET Framework 1.1 Service Pack 1 SYSTEM.WEB.DLL and MSCOREE.DLL Security
Update for Windows Vista (KB929729)

http://download.microsoft.com/downlo...929729-X86.exe

Please follow the steps above and if still problem persist please lets us know

Regards,

Om