How to solve MS Outlook 2007 Error: “Cannot start Microsoft Outlook. Cannot open the Outlook window.”0

One of my clients encountered a problem when opening Microsoft Outlook 2007: “Cannot start Microsoft Outlook. Cannot open the Outlook window.” after previously being able to open it.

Solution:

Go to Start > Run and type the following: “outlook.exe /resetnavpane” (without the quotation marks) and press Enter.

This should fix the problem.

The “/resetnavpane” Outlook command switch clears and regenerates the MS Outlook navigation pane for the current profile.