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

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:

Hope you can help.

Hubert C

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Rob HutchinsonTech Lead, Desktop SupportCommented:
This might help:
Answer Ninja'd from Micro$oft's website:

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:
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
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 SupportCommented:
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!
Question PAQ'd, 500 points refunded, and stored in the solution database.

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Windows Server 2008

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