Try using: C:\Program Files\Microsoft Office\Office12\scanpst.exe to repair file.  For files larger that 2GB, use PST2GB tool to truncate file: http://www.microsoft.com/downloads/details.aspx?FamilyID=B33B1DFF-6F50-411D-BBDF-82019DDA602E&displaylang=en

To add the 'Unread Mail' item to the 'Favorite Folders' in Outlook:
1. Click on the 'Folder List' icon at the bottom on the left-hand side of Outlook.

2. Expand the 'Search Folders' menu.
3. Right-click the 'Unread Mail' item.