Cannot start Microsoft Office Outlook. Cannot open the Outlook window

This problem can occur when file that maintains the Navigation Pane settings becomes corrupted. This file is called profilename.xml, where profilename is the name of your Outlook profile. This file is stored in the following folder:

Windows XP

C:\Documents and Settings\username\Application Data\Microsoft\Outlook
Windows Vista, Windows 7

C:\Users\username\AppData\Roaming\Microsoft\Outlook
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