Subsequent searching of internet found the answer to my problem - Microsoft
Fix-it 50202. described on Microsoft Knowledge Base Article KB 971058 found
at
http://support.microsoft.com/kb/971058
I choose the auto fix method but you can choose to fix it yourself.
Everything OK now. Updates working fine.
"barrowhill" <> wrote in message
news

pT7p.55298$2...
> Running windows XP. Unable to perform windows update as "files required
> to use Microsoft update are no longer registered or installed on your
> computer" You then have two options; one to re-register files or two, get
> additional help. I've had this problem on and off for some time and have
> overcome by doing a system restore. However, as this is no longer an
> option I tried to re-register (first option) but the fails with error
> 0x8034d007
>
> Next followed Option 2 and read a number of KB articles and other forum
> info and done quite a bit to resolve. Latest has been to delete files in
> SoftwareDistribution\Download Folder as well as
> SoftwareDistribution\EventCache folder.
>
> I've downloaded a fresh copy of the Windows Update Agent
> (windowsupdateagent30-x86.exe) and performed a forced install (switch
> /wuforce). The Windows Update Agent Installer window shows an install
> failure with error code 0x8024d007 - the same error you get by
> re-registering !
>
> I'd really appreciate some help and advice getting the update service
> working again
>