I am lost. I cannot figure this one out. I have tried every spyware/virus scanner under the sun and nothing seems to work.

I am getting a security message from Zone Alarm (under these conditions: starting computer from cold and opening Microsoft Outlook for the first time in that session), three days ago since I downloaded a security update to Microsoft Office 2007 and update to Zone Alarm. I now get an alert: Microsoft Office is trying to inject code into Windows Explorer.

Sounds suspicious, so I deny permission. Outlook functions normally after that. But what is the deal with this? I am not a "computer person" (though my wife was a software engineer for Digital Equipment Corporation, so I do have some expertise to draw on here), so explanations of how to deal with this have to be in "simple English." What might be causing this, and how might I correct it?