1] Click the Start button then Run:
on the textbox please paste the line below:
%userprofile%\Application Data\Microsoft\Outlook
[ it will a open windows explorer and locate the files listed below, you can delete it or move it somewhere]
* e<Number>.xml – Stores some Flags
* e<Number>.nk2 – Caches Names/Addresses for the “to” field.
* e<Number>.srs – stores the Send/Receive-Settings
* outcmd.dat – Stores changes to the ToolBars
2] On the address bar of the Windows Explorer replace the path with the line below:
%userprofile%\Local Settings\Application Data\Microsoft\Outlook
[ then locate and delete or move the listed files below. ]
* outlook<Digit>.ost – local copy of the Mailbox
* *.oab – Offline Addressbook.
* extend.dat – stores some Settings regarding extensions.
Posted by unja 

