Cannot start Microsoft Outlook. Cannot open the Outlook window

While there are various reasons for this to occur, some post Office 2007 Service Pack 2 updates seems to cause this error for certain configurations but it can also occur in Outlook 2010 and Outlook 2003.

In these instances, the configuration file for the Navigation Pane gets corrupted and prevents Outlook from starting successfully. To recover, you can start Outlook with the resetnavpane switch;

Windows Vista and Windows 7
Start-> type; outlook.exe /resetnavpane

Windows XP
Start-> Run; outlook.exe /resetnavpane

Please note the space between outlook.exe and /resetnavpane.


 

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