I am getting error code 80070490 - Windows Update Encountered an Unknown Error

HubertCarpet
HubertCarpet used Ask the Experts™
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Hello Experts,

I am getting error code 80070490 - Windows Update Encountered an Unknown Error on my Windows Server 2008 x64 Standard machine.  No errors in event log that I can see.  Nothing much on the web other than 'Reinstall' or 'Upgrade'.

Here's a screen grab:
http://www.screencast.com/users/Bickers/folders/Jing/media/387c1eda-667b-4f55-8971-922c48597f92

Hope you can help.

Hubert C

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Rob HutchinsonTech Lead, Desktop Support

Commented:
This might help:
Answer Ninja'd from Micro$oft's website:
http://www.microsoft.com/communities/newsgroups/en-us/default.aspx?dg=microsoft.public.windowsupdate&tid=1f153ed7-8081-4715-a18a-fbf64f9a0012&p=1

The issue can be caused by a damaged .NET Framework component. At this time,
let's refer to the following steps to troubleshoot it:

Step 1: Download Microsoft Windows Installer CleanUp utility
============================================
1. Visit:
http://download.microsoft.com/download/E/9/D/E9D80355-7AB4-45B8-80E8-983A48D5E1BD/msicuu2.exe 
2. Please save the file on your Desktop
3. Please double click the msicuu2.exe file to install it onto your computer.

Step 2: Remove .NET Framework 2.0
===========================
1. Click Start Button -> All Programs->Windows Installer Clean Up.
2. Please locate and remove.NET Framework software.
After that, please perform the following suggestions to reinstall .NET
Framework 2.0 and its update.

Step 3: Reinstall .NET Framework Version 2.0 Redistributable Package and its
update
================================================================
Please download and install the following updates one by one using sequence.
Microsoft .NET Framework Version 2.0 Redistributable Package (x86) http://download.microsoft.com/download/5/6/7/567758a3-759e-473e-bf8f-52154438565a/dotnetfx.exe 
.NET Framework 2.0 SYSTEM.WEB.DLL Security Update for Windows Vista http://www.microsoft.com/downloads/details.aspx?FamilyID=cbc9f3cf-c3c3-45c4-82e3-e11398bc2cd2&DisplayLang=en 
Rob HutchinsonTech Lead, Desktop Support

Commented:
Might also want to reinstall the version of .Net framework that you are currently using and not just follow the steps blindly installing ver 2.0
Many thanks for this - sorry for not replying sooner (I did return to look at my XX account but have no open questions shown so figured it had got lost!)  Anyway, in the meantime I did a OS repair/re-install which did the trick.  I will file away your answer for future reference however as I have a feeling this might crop up again!
Commented:
Question PAQ'd, 500 points refunded, and stored in the solution database.

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