Windows update fails with error code 0x643

Hello to all, welcome.

We will need to collect more information about the update failure. Please do the following:

1. Reproduce the steps to get the error. Basically, try and repeat the steps you just took to the point where it fails
2. Click Start > Search
3. Type 'Windowsupdate.log' in the field as to what to search for. Make sure you you check to enable searching in hidden and system directories
4. Click on the Windowsupdate.log to open it
5. Scroll to the bottom of the text file.  (tip: press CTRL + END)
6. Copy approximately the last 30 lines of the text file, and paste it here as a reply

Thanks!

Ryan Thieman

Microsoft Answers Support Engineer

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Windows XP, Media Center Edition, version 2002, SP 3

[post withdrawn]

I am having problems doing updates on my Windows XP Pro laptop at my place of business.

These are the following updates that will download, but not install followed by their error codes:　

Microsoft .NET Framework 2.0 Service Pack 2 Security Update for Windows 2000, Windows Server 2003, and Windows XP (KB974417)

Error Code: 0x645

　Microsoft .NET Framework 3.5 Service Pack 1 and .NET Framework 3.5 Family Update for .NET versions 2.0 through 3.5 (KB951847) x86

Error Code: 0x80070645

　Microsoft .NET Framework 1.1 Service Pack 1 Security Update for Windows 2000, Windows XP, Windows Vista, Windows Server 2008, Windows 7, and Windows Server 2008 R2 (KB953297)

Error Code: 0x66A 　

I have manually tried to download and install the .Net Framework Service Pack 2 KB974417. However, when I try to install it, I receive the message: "None of the products that are addressed by this software update are installed on this computer. Click Cancel to exit setup."　

I am not sure if this is the cause of the problem, but I had a disk consumption problem a little while ago where my C:\WINDOWS\Installer file was taking up 36G of my 55G drive.

I used the Windows Installer Clean Up utility to remove any .msp files that are not registered on the system. I accomplished this with the following command:

C:\Program Files\Windows Installer Clean Up\msizap G!

This reduced the size of the C:\WINDOWS\Installer file tremendously, but I had to reinstall all of my Office products.

I am not sure if this is related to my Windows Updates issue or not, but thought I should mention it.

Any help with this issue would be appreciated.

Hi,

Try this 1st to see if it helps :

Description of the Patch Registration Cleanup Tool

http://support.microsoft.com/kb/976220/

If needed :

Try this - Control Panel - Windows Updates - on each Update that will not install - Click the Important Updates

or the Update itself - double click one then click View More Informations (or click on it then View on right side)

Those will take you to a page where  you can download the update. Or go here and put in the KBxxxxxx number

to download it.

Microsoft Download Center

http://www.microsoft.com/downloads/en/default.aspx

Download - SAVE - go to where you put them - Right Click on - RUN AS ADMIN

Then you can Right Click on the Update in Windows Updates and HIDE.

If you get an installer error install this version :

Windows Installer 4.5 Redistributable

http://www.microsoft.com/downloads/details.aspx?FamilyID=5a58b56f-60b6-4412-95b9-54d056d6f9f4&displaylang=en

Then run these :

How do I reset Windows Update components? - a Mr Fixit

http://support.microsoft.com/kb/971058

Description of the System Update Readiness Tool for Windows Vista, for Windows Server 2008, and for Windows 7

http://support.microsoft.com/kb/947821

If needed you can get free incident reports however the above should take care of it for you.

For Windows Updates - Free Incident Report

Go Here and Click -> Windows Update fails while scanning for, downloading, or installing updates

http://support.microsoft.com/gp/wusupport#tab3

Hope this helps.

Rob - Bicycle - Mark Twain said it right.