From: Chris Robinson 

I just heard from a guy at work that the slowdowns have something to do
with Antivirus-software, especially McAfee and Norton.  I can't confirm
this though as I haven't installed the patch yet.

Chris.

Rich Gauszka wrote:

> There are reports of slowdowns caused with MS update patch  Q811493 on the
> Microsoft.public.windowsupdate forum.
> The reply from an MS person was.
> -----------------------------------------------------------------------
> Thank you for the info.  I'm not sure yet what is conflicting with 811493.
> We currently have a group of developers working on the problem.  We'll get
> this resolved as soon as possible.
>
> Sorry for the inconvenience.
>
> Thanks,
> Lucy [MS]
> ----------------------------------------------------------------------------
> ---
>
> It may be a good idea to wait before applying this patch. I don't have the
> extreme slowdown some have reported but at times I get a 15-20 second pause
> when launching applications that I didn't have before applying the patch.
> Unfortunately this "pause" seems to be quite random on my system

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