If Outlook cannot open because the Personal Folder.pst file is damaged, and it says to run the Scanpst.exe tool after closing Outlook, then run the program according to these directions: http://support.microsoft.com/kb/272227

When the tool opens, copy the file path to the Personal Folder.pst file in the appropriate box and press start.  The program will run and then prompt you to to repair the file.  After the program is done, open Outlook to confirm that the repair was successful.

Article number: 
536
Last updated: 
May 23, 2016