I found a fix for this yesterday. Please see the following post...
http://www.microsoft.com/communities...a-56dcd25f5311
"Blue_InTheFace" wrote:
> I have exact the same problems. Hints I found didn't help
> (popup blocker settings//register urlmon.dll)
>
> "RadiantArchon" wrote:
>
> > i open up microsoft update. i choose the custom option and is scan my comp.
> > the screen where you selction stuff pops up. if you click on any on the
> > buttons on the left frame (high priority. software optional ect.) it starts
> > widows update over agian in the right frame. what do i do?????