Initializing MAPI session object failed error

Hi,
I upgraded from a previous version of Outlook to Outlook 2010.
Whenever I open an Outlook email I receive an error; if I click OK, the email opens but basically I know there is a problem with the underlying configuration.

Shortcut Error
Initializing MAPI session object failed.
I have tried to rename the underlying DLL on by going to D:WindowsSystem32, аnԁ renaming mapi32.dll, but then I don’t what to rename it. If you have any idea on how to correct this, please, help.
Thank you.
