this solution worked for me.
http://www.wsus.info/forums/index.php?showtopic=6149
"Paul" wrote:
> Hello,
>
> I would appreciate it very much if someone could help me
> with the following problem. I am on a standalone Windows
> XP machine and unable to install any updates, whether it
> is from the Windows Update site or via Automatic Updates.
> When I look in the WindowsUpdate.log file the first error
> that is listed is the following:
>
> Error: 0x80070005. wuauclt handler: failed to spawn COM server
>
> I tried many of the suggestions recommended in the Windows
> Update Troubleshooter and this newsgroup, but unfortunately
> none of them worked. Does anyone know how to deal with the
> specific error listed above?
>
> I have attached the complete WindowsUpdate.log file in
> case anybody would like to look at it.
>
> Thank you very much for any help.
>
> - Paul
>
>
>
>