This morning when I started my computer I got this message from Outlook 2007:

"Cannot start Microsoft Office Outlook. Cannot open the outlook window."</blockquote>

After searching for a while I found this page on Microsoft Answers, which solved it. Basically the solution was to start Outlook with a command line switch that resets the navigation pane. Problem solved! The command was:

Outlook.exe /resetnavpane</blockquote>