Explorer Opening Files Slow (DDE)

Recently my computer has been opening certain files that are double-clicked very very slowly--2 - 3 minutes, thats right minutes! If I open the file by launching the application then open the file via the Open menu item, all works as expected.I did some investigation and found that this happened to certain file types that were double-clicked from the desktop or from email attachments. This behavior happens from Excel, Word, Project, Access or Internet Explorer shortcuts that are in emails. PowerPoint, Infopath, Publisher and Visio all open normally (2-3 seconds).

Digging further showed that each of the file types that takes minutes to open all have something in the DDE Message field of the Entering Action for Type (File Explorer window, Tools, Folder Options, Select "Doc" file type, Select Advanced, Highlight Open, Select Edit). The file types that open normally don't have anything in this field. This is why I think the behavior is related to DDE.I have tried the "Detect and Repair" option of Office for my troubled apps but this does not have any effect on the problem. I have also tried using msconfig to do a Diagnostic Startup and it have no effect on the problem.