I am using Norton 10.  I have had a failure in MS Outlook 2007 in that the file Outlook1.pst has become corrupted.  At first I couldn't open Outlook but I paid for help and now I can open Outlook but only old folders appear.  I have lost many current folders and the email contained therein.  I would like to restore Outlook to an earlier date without affecting any other programs.  I use quickbooks and that is current and I don't want to remove any of my latest entries.  I can search out folders in the Recover Files mode, but I don't know what folder and sub folders to recover.  Any Suggestions?