Repairing a Personal Folders file (.pst)
You may need to use the Repair PST Tool if you open your Outlook .pst file and receive this error message:
Unable to expand the folder. The set of folders could not be opened. Errors could have been detected in the file drive:\Documents and Settings\user\Local Settings\Application Data\Microsoft\Outlook\Outlook.pst. Quit all mail-enabled applications, and then use the Inbox Repair Tool.
The tool gives you full control over the recovery process.
