Outlook 2007 Crashes NIS 2011

When I open Office Outlook to check emails, NIS crashes.

 

When I try to restart NIS, I get the "One Click Support" the error code 8504, 104" is given. I have followed the advice given on the support site (use norton power eraser, uninstall then reinstall norton) and the problem hasn't fixed.

 

OS: Windows Vista Home Basic

Office Outlook 2007 (part of Office 2007 Enterprise edition)

NIS 2011