The Security Mentor

Microsoft's security fixes are available as of today, and they include repairs to some dangerous problems both in Windows and in Office. Update both. The bugs being fixed are the scary kind that allow bad guys to take over your computer completely.

The Office vulnerabilities show up when a bad guy feeds toxic input to an Office app, for example by emailing you a spreadsheet which he's boobytrapped. Something as simple as pasting in a picture could also trigger the bugs.