Techs with Windows 7+IE8 all lost connectivity to the Service Desk webpages. Only a blank page is displayed. If IE settings are altered to always prompt for username and password on the intranet zone (where the service is located) they are being presented the normal login dialog but a successful authentication results in a blank page.

Windows 7+IE8 still worked ok a few days ago.

Same users using Firefox or an Windows XP computer can log on successfully and get the servicedesk pages displaying normally.

I assume this is a W7+IE8 matter and connected to some recent WIndows update but I cannot figure out what update it might be and why this happens. Anyone else seeing this same behaviour?