I did the usual downloads today, a couple of dozen of them half of which were for MS Office programs. Nothing too unusual about that. After the download and install, had the mandatory reboot, so far so good. Tried to open my Outlook 2010 it came up for around 5 secs and disappeared. Tried another reboot and it did the same. Good old Microsoft have totally stuffed this one up, had to do a system restore to get Outlook running again. So be very wary about downloading the current crop of updates especially for Office, something in there was totally screwy. I am running Office 2010, maybe it was just this iteration, but who knows what MS can stuff up
Apparently this KB is the culprit.
kb3097877