This question was asked in the Microsoft Forums and my reply was marked as an Answer. User was unable to open Microsoft Outlook 2007.
The remedy suggested was to:
Start->run..then type the following -> “Outlook.exe /resetnavpane”
Its a common issue and MS has already documented it, check the link below for full details:
http://support.microsoft.com/kb/2022778/en-us
Link to Microsoft Forums thread:- http://social.technet.microsoft.com/Forums/en-US/officeitpro/thread/f55b49ae-29cb-428e-a085-2f1e655bfdce/#be64a97c-6577-4e05-8da0-194e2b85d6e8
