Windows/ update problem

Hello all, I ran in to a problem that Windows automatic update kicks on with
the yellow shield at the taskbar during regular business hours. It
tremendously slowed down our network. To the point where websites are timing
out. I placed a call with Microsoft yesterday asking them what IP addresses
Windows Automatic Update uses and heres the list that they gave us:

•       http://download.windowsupdate.com
•       https://*.windowsupdate.microsoft.com
•       http://*.windowsupdate.microsoft.com
•       http://*.update.microsoft.com
•       http://*.download.windowsupdate.com
•       http://update.microsoft.com
•       http://*.windowsupdate.com
•       http://download.microsoft.com
•       http://windowsupdate.microsoft.com
•       http://ntservicepack.microsoft.com
•       http://wustat.windows.com
•       https://*.update.microsoft.com

The ones with the asterisks we cant use because our firewall (Juniper
Netscreen 500) does not use a URL filter. So, we need the exact adresses that
Microsoft/Windows updates uses (ex: download.windowsupdate.com or
update.microsoft.com). This is just a temporary fix so whenever this happens
we can temporarily block the sites through our firewall. Anybody here know
more addresses? Your help is much appreciated. Thanks.